Move DECLARE_GLOBAL_DATA_PTR to file scope

It can be optimised out by the compiler otherwise resulting
in obscure errors like a board not booting.

This has been documented in README since 2006 when these were
first fixed up for GCC 4.x.

Signed-off-by: John Rigby <john.rigby@linaro.org>

Fix some additional places.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-By: Albert ARIBAUD <albert.aribaud@free.fr>
diff --git a/board/isee/igep0030/igep0030.c b/board/isee/igep0030/igep0030.c
index bb4dc3b..6a92735 100644
--- a/board/isee/igep0030/igep0030.c
+++ b/board/isee/igep0030/igep0030.c
@@ -30,14 +30,14 @@
 #include <asm/mach-types.h>
 #include "igep0030.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 /*
  * Routine: board_init
  * Description: Early hardware init.
  */
 int board_init(void)
 {
-	DECLARE_GLOBAL_DATA_PTR;
-
 	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
 	/* board id for Linux */
 	gd->bd->bi_arch_number = MACH_TYPE_IGEP0030;