src/platforms: move all headers to platforms/common/include/px4_platform_common

and remove the px4_ prefix, except for px4_config.h.

command to update includes:
for k in app.h atomic.h cli.h console_buffer.h defines.h getopt.h i2c.h init.h log.h micro_hal.h module.h module_params.h param.h param_macros.h posix.h sem.h sem.hpp shmem.h shutdown.h tasks.h time.h workqueue.h; do for i in $(grep -rl 'include <px4_'$k src platforms boards); do sed -i 's/#include <px4_'$k'/#include <px4_platform_common\/'$k/ $i; done; done
for in $(grep -rl 'include <px4_config.h' src platforms boards); do sed -i 's/#include <px4_config.h/#include <px4_platform_common\/px4_config.h'/ $i; done

Transitional headers for submodules are added (px4_{defines,log,time}.h)

src/examples/bottle_drop/bottle_drop.cpp

@@ -40,8 +40,8 @@
  * @author Julian Oes <joes@student.ethz.ch>
  */
 
-#include <px4_config.h>
-#include <px4_tasks.h>
+#include <px4_platform_common/px4_config.h>
+#include <px4_platform_common/tasks.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

src/examples/bottle_drop/bottle_drop_params.c

@@ -38,7 +38,7 @@
  * @author Dominik Juchli <juchlid@ethz.ch>
  */
 
-#include <px4_config.h>
+#include <px4_platform_common/px4_config.h>
 #include <parameters/param.h>
 
 /**

src/examples/dyn_hello/hello.cpp

@@ -1,5 +1,5 @@
-#include <px4_log.h>
-#include <px4_app.h>
+#include <px4_platform_common/log.h>
+#include <px4_platform_common/app.h>
 
 extern "C" __EXPORT int hello_main(int argc, char *argv[]);
 int hello_main(int argc, char *argv[])

src/examples/fixedwing_control/main.cpp

@@ -49,8 +49,8 @@
 #include <drivers/drv_hrt.h>
 #include <lib/ecl/geo/geo.h>
 #include <matrix/math.hpp>
-#include <px4_config.h>
-#include <px4_tasks.h>
+#include <px4_platform_common/px4_config.h>
+#include <px4_platform_common/tasks.h>
 #include <systemlib/err.h>
 #include <parameters/param.h>
 #include <perf/perf_counter.h>

src/examples/hello/hello_example.cpp

@@ -40,7 +40,7 @@
  */
 
 #include "hello_example.h"
-#include <px4_time.h>
+#include <px4_platform_common/time.h>
 #include <unistd.h>
 #include <stdio.h>
 

src/examples/hello/hello_example.h

@@ -39,7 +39,7 @@
  */
 #pragma once
 
-#include <px4_app.h>
+#include <px4_platform_common/app.h>
 
 class HelloExample
 {

src/examples/hello/hello_main.cpp

@@ -40,8 +40,8 @@
 
 #include "hello_example.h"
 
-#include <px4_app.h>
-#include <px4_init.h>
+#include <px4_platform_common/app.h>
+#include <px4_platform_common/init.h>
 #include <stdio.h>
 
 int PX4_MAIN(int argc, char **argv)

src/examples/hello/hello_start.cpp

@@ -39,9 +39,9 @@
  */
 #include "hello_example.h"
 
-#include <px4_log.h>
-#include <px4_app.h>
-#include <px4_tasks.h>
+#include <px4_platform_common/log.h>
+#include <px4_platform_common/app.h>
+#include <px4_platform_common/tasks.h>
 #include <stdio.h>
 #include <string.h>
 #include <sched.h>

src/examples/hwtest/hwtest.c

@@ -42,7 +42,7 @@
 #include <string.h>
 
 #include <drivers/drv_hrt.h>
-#include <px4_config.h>
+#include <px4_platform_common/px4_config.h>
 #include <systemlib/err.h>
 #include <uORB/topics/actuator_armed.h>
 #include <uORB/topics/actuator_controls.h>

src/examples/matlab_csv_serial/matlab_csv_serial.c

@@ -40,7 +40,7 @@
  * @author Lorenz Meier <lm@inf.ethz.ch>
  */
 
-#include <px4_config.h>
+#include <px4_platform_common/px4_config.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <stdio.h>

src/examples/px4_mavlink_debug/px4_mavlink_debug.cpp

@@ -38,7 +38,7 @@
  * @author Example User <mail@example.com>
  */
 
-#include <px4_config.h>
+#include <px4_platform_common/px4_config.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <string.h>

src/examples/px4_simple_app/px4_simple_app.c

@@ -38,9 +38,9 @@
  * @author Example User <mail@example.com>
  */
 
-#include <px4_config.h>
-#include <px4_tasks.h>
-#include <px4_posix.h>
+#include <px4_platform_common/px4_config.h>
+#include <px4_platform_common/tasks.h>
+#include <px4_platform_common/posix.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <poll.h>

src/examples/rover_steering_control/main.cpp

@@ -39,8 +39,8 @@
  * @author Lorenz Meier <lorenz@px4.io>
  */
 
-#include <px4_config.h>
-#include <px4_tasks.h>
+#include <px4_platform_common/px4_config.h>
+#include <px4_platform_common/tasks.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

src/examples/uuv_example_app/uuv_example_app.cpp

@@ -41,9 +41,9 @@
  * @author Nils Rottann <Nils.Rottmann@tuhh.de>
  */
 
-#include <px4_config.h>
-#include <px4_tasks.h>
-#include <px4_posix.h>
+#include <px4_platform_common/px4_config.h>
+#include <px4_platform_common/tasks.h>
+#include <px4_platform_common/posix.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <poll.h>