mx53evk: Remove unused get_board_rev function

No board information is passed for MX53EVK, so remove get_board_rev function.

Cc: Jason Liu <r64343@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Jason Liu <r64343@freescale.com>

board/freescale/mx53evk/mx53evk.c

@@ -39,11 +39,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-u32 get_board_rev(void)
-{
-	return get_cpu_rev();
-}
-
 int dram_init(void)
 {
 	/* dram_init must store complete ramsize in gd->ram_size */

include/configs/mx53evk.h

@@ -34,7 +34,6 @@
 #include <asm/arch/imx-regs.h>
 
 #define CONFIG_CMDLINE_TAG			/* enable passing of ATAGs */
-#define CONFIG_REVISION_TAG
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_INITRD_TAG