mx23evk: Turn on caches

It is safe to turn on data and instruction caches for mx23.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

include/configs/mx23evk.h

@@ -33,8 +33,6 @@
 #define CONFIG_MACH_TYPE	MACH_TYPE_MX23EVK
 
 #define CONFIG_SYS_NO_FLASH
-#define CONFIG_SYS_ICACHE_OFF
-#define CONFIG_SYS_DCACHE_OFF
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_ARCH_MISC_INIT