MX31: mx31pdk: drop enable_caches from board file

enable_caches() is implemented now in cpu.c for
ARM1136.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Fabio Estevam <fabio.estevam@freescale.com>

board/freescale/mx31pdk/mx31pdk.c

@@ -71,19 +71,11 @@ int board_early_init_f(void)
 	return 0;
 }
 
-void enable_caches(void)
-{
-	icache_enable();
-	dcache_enable();
-}
-
 int board_init(void)
 {
 	/* adress of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
 
-	enable_caches();
-
 	return 0;
 }