Exynos5: config: Enable FIT

Adding two configs:
* CONFIG_FIT - Enable FIT image support.
* CONFIG_FIT_BEST_MATCH - Enable fetching correct DTB from
			  FIT image by comparing compatibles.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

include/configs/smdk5250.h

@@ -14,4 +14,8 @@
 #undef CONFIG_DEFAULT_DEVICE_TREE
 #define CONFIG_DEFAULT_DEVICE_TREE	exynos5250-smdk5250
 
+/* Enable FIT support and comparison */
+#define CONFIG_FIT
+#define CONFIG_FIT_BEST_MATCH
+
 #endif	/* __CONFIG_SMDK_H */

include/configs/smdk5420.h

@@ -51,4 +51,8 @@
 
 #define CONFIG_MAX_I2C_NUM	11
 
+/* Enable FIT support and comparison */
+#define CONFIG_FIT
+#define CONFIG_FIT_BEST_MATCH
+
 #endif	/* __CONFIG_5420_H */

include/configs/snow.h

@@ -14,4 +14,8 @@
 #undef CONFIG_DEFAULT_DEVICE_TREE
 #define CONFIG_DEFAULT_DEVICE_TREE	exynos5250-snow
 
+/* Enable FIT support and comparison */
+#define CONFIG_FIT
+#define CONFIG_FIT_BEST_MATCH
+
 #endif	/* __CONFIG_SNOW_H */