sched: Don't include nuttx/sched.h inside sched.h

But let nuttx/sched.h include sched.h instead to
avoid expose nuttx kernel API to userspace.

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

wireless/bluetooth/bt_atomic.c

@@ -24,7 +24,7 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <nuttx/irq.h>
+#include <nuttx/spinlock.h>
 
 #include "bt_atomic.h"
 

wireless/bluetooth/bt_buf.c

@@ -51,7 +51,7 @@
 #include <errno.h>
 #include <debug.h>
 
-#include <nuttx/arch.h>
+#include <nuttx/spinlock.h>
 #include <nuttx/kmalloc.h>
 #include <nuttx/mm/iob.h>
 #include <nuttx/net/bluetooth.h>

wireless/bluetooth/bt_hcicore.c

@@ -58,6 +58,7 @@
 
 #include <nuttx/clock.h>
 #include <nuttx/kthread.h>
+#include <nuttx/spinlock.h>
 #include <nuttx/wqueue.h>
 #include <nuttx/net/bluetooth.h>
 #include <nuttx/wireless/bluetooth/bt_core.h>

wireless/bluetooth/bt_netdev.c

@@ -35,8 +35,7 @@
 
 #include <arpa/inet.h>
 
-#include <nuttx/arch.h>
-#include <nuttx/irq.h>
+#include <nuttx/spinlock.h>
 #include <nuttx/kmalloc.h>
 #include <nuttx/signal.h>
 #include <nuttx/wdog.h>