Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTR

We have a large number of places where while we historically referenced
gd in the code we no longer do, as well as cases where the code added
that line "just in case" during development and never dropped it.

Signed-off-by: Tom Rini <trini@konsulko.com>

drivers/ddr/altera/sdram.c

@@ -12,8 +12,6 @@
 #include <asm/arch/system_manager.h>
 #include <asm/io.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 struct sdram_prot_rule {
 	u32	sdram_start;	/* SDRAM start address */
 	u32	sdram_end;	/* SDRAM end address */

drivers/ddr/fsl/main.c

@@ -15,8 +15,6 @@
 #include <fsl_ddr_sdram.h>
 #include <fsl_ddr.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 /*
  * CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY is the physical address from the view
  * of DDR controllers. It is the same as CONFIG_SYS_DDR_SDRAM_BASE for