[include] fix a few includes

include/app.h

@@ -24,6 +24,7 @@
 #define __APP_H
 
 #include <stddef.h>
+#include <compiler.h>
 
 /* app support api */
 void apps_init(void); /* one time setup */

include/reg.h

@@ -23,7 +23,7 @@
 #ifndef __REG_H
 #define __REG_H
 
-#include <sys/types.h>
+#include <stdint.h>
 
 /* low level macros for accessing memory mapped hardware registers */
 #define REG64(addr) ((volatile uint64_t *)(uintptr_t)(addr))

include/stdio.h

@@ -26,6 +26,7 @@
 #include <compiler.h>
 #include <debug.h>
 #include <printf.h>
+#include <sys/types.h>
 
 __BEGIN_CDECLS