Exynos: config: Enable hash command

This enables hash command.

Tested with command "hash sha256 0x40008000 0x2B 0x40009000".
Used mm and md to write a standard string to memory location
0x40008000 and ran the above command to verify the output.

Signed-off-by: ARUN MANKUZHI <arun.m@samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>

include/configs/exynos5250-dt.h

@@ -48,6 +48,7 @@
 
 /* Enable ACE acceleration for SHA1 and SHA256 */
 #define CONFIG_EXYNOS_ACE_SHA
+#define CONFIG_SHA_HW_ACCEL
 
 #define CONFIG_SYS_SDRAM_BASE		0x40000000
 #define CONFIG_SYS_TEXT_BASE		0x43E00000
@@ -117,6 +118,7 @@
 #define CONFIG_CMD_EXT2
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_NET
+#define CONFIG_CMD_HASH
 
 #define CONFIG_BOOTDELAY		3
 #define CONFIG_ZERO_BOOTDELAY_CHECK