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/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index d9b6f01..c066d6e 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -51,6 +51,8 @@
 
 #define BEAGLE_NO_EEPROM		0xffffffff
 
+DECLARE_GLOBAL_DATA_PTR;
+
 static struct {
 	unsigned int device_vendor;
 	unsigned char revision;
@@ -66,8 +68,6 @@
  */
 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_OMAP3_BEAGLE;