revise some RT_USING_POSIX to RT_USING_POSIX_DEVIO

examples/libc/termios_test.c

@@ -14,18 +14,6 @@
 #include <string.h>
 #include <sys/time.h>
 
-#if defined (RT_USING_POSIX)
-    #include <dfs_posix.h>
-    #include <sys/select.h>
-    #if defined (RT_USING_POSIX_TERMIOS)
-        #include <termios.h>
-    #else
-        #error "TERMIOS need RT_USING_POSIX_TERMIOS"
-    #endif
-#else
-    #error "POSIX poll/select need RT_USING_POSIX"
-#endif
-
 #define JOINT(x,y) x##y
 #define B(x) JOINT(B,x)
 #define Default_baud_rate   115200

examples/rt-link/rtlink_dev_example.c

@@ -45,7 +45,7 @@ static rt_err_t rtlink_dev_tx_done(rt_device_t dev, void *buffer)
     return RT_EOK;
 }
 
-#ifdef RT_USING_POSIX
+#ifdef RT_USING_POSIX_DEVIO
 #include <dfs_posix.h>
 #include <poll.h>
 #include <sys/select.h>
@@ -205,7 +205,7 @@ static void rtlink_fselect()
     }
 }
 MSH_CMD_EXPORT(rtlink_fselect, rtlink posix interface example);
-#endif  /* RT_USING_POSIX */
+#endif  /* RT_USING_POSIX_DEVIO */
 
 static void rtlink_dread(void)
 {