rtos: remove config.h includes from stackings headers

And add its own header to the rtos_xxx_stackings.c

Signed-off-by: Erhan Kurubas <erhan.kurubas@espressif.com>
Change-Id: I084130fde7ee8645129a7cf60bb7bf59448e2f39
Reviewed-on: https://review.openocd.org/c/openocd/+/7441
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

src/rtos/rtos_ecos_stackings.c

@@ -5,8 +5,9 @@
 #endif
 
 #include "rtos.h"
-#include "rtos_standard_stackings.h"
 #include "target/armv7m.h"
+#include "rtos_standard_stackings.h"
+#include "rtos_ecos_stackings.h"
 
 /* For Cortex-M eCos applications the actual thread context register layout can
  * be different between active threads of an application depending on whether