global_data: unify global flag defines

All the global flag defines are the same across all arches.  So unify them
in one place, and add a simple way for arches to extend for their needs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/powerpc/include/asm/global_data.h b/arch/powerpc/include/asm/global_data.h
index 01f1d4a..5a5877f 100644
--- a/arch/powerpc/include/asm/global_data.h
+++ b/arch/powerpc/include/asm/global_data.h
@@ -33,8 +33,6 @@
  * some locked parts of the data cache) to allow for a minimum set of
  * global variables during system initialization (until we have set
  * up the memory controller so that we can use RAM).
- *
- * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
  */
 
 typedef	struct	global_data {
@@ -186,17 +184,7 @@
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
 } gd_t;
 
-/*
- * Global Data Flags
- */
-#define	GD_FLG_RELOC		0x00001	/* Code was relocated to RAM		*/
-#define	GD_FLG_DEVINIT		0x00002	/* Devices have been initialized	*/
-#define	GD_FLG_SILENT		0x00004	/* Silent mode				*/
-#define	GD_FLG_POSTFAIL		0x00008	/* Critical POST test failed		*/
-#define	GD_FLG_POSTSTOP		0x00010	/* POST seqeunce aborted		*/
-#define	GD_FLG_LOGINIT		0x00020	/* Log Buffer has been initialized	*/
-#define GD_FLG_DISABLE_CONSOLE	0x00040	/* Disable console (in & out)		*/
-#define GD_FLG_ENV_READY	0x00080	/* Environment imported into hash table	*/
+#include <asm-generic/global_data_flags.h>
 
 #if 1
 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("r2")