SMDK5250: Enable SPI Gigabyte device.

This patch enables gigabyte device for SMDK5250.

Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

include/configs/exynos5250-dt.h

@@ -262,6 +262,7 @@
 #define CONFIG_CMD_SF
 #define CONFIG_CMD_SPI
 #define CONFIG_SPI_FLASH_WINBOND
+#define CONFIG_SPI_FLASH_GIGADEVICE
 #define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
 #define CONFIG_SF_DEFAULT_SPEED		50000000
 #define EXYNOS5_SPI_NUM_CONTROLLERS	5