POST/arm: adaptations needed for POST on ARM to work

For post to run on ARM, 3 things are needed:
- post_log_word to be defined in gd
- a post.h include in arch/arm/lib/board.c

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h
index b85b7fe..1264d30 100644
--- a/arch/arm/include/asm/global_data.h
+++ b/arch/arm/include/asm/global_data.h
@@ -78,6 +78,10 @@
 #endif
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
+#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
+	unsigned long	post_log_word; /* Record POST activities */
+	unsigned long	post_init_f_time; /* When post_init_f started */
+#endif
 } gd_t;
 
 /*