ARM: exynos_defconfig: Enable exynos-gsc driver as module

Exynos5 SoCs have a General SCALER (GSCALER) IP block that can be used
to do video streams scaling and color space conversions by hardware.
Enable support for its driver as a module so the GSCALER can be tested.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/configs/exynos_defconfig

@@ -155,6 +155,7 @@ CONFIG_VIDEO_EXYNOS4_FIMC_IS=m
 CONFIG_V4L_MEM2MEM_DRIVERS=y
 CONFIG_VIDEO_SAMSUNG_S5P_JPEG=m
 CONFIG_VIDEO_SAMSUNG_S5P_MFC=m
+CONFIG_VIDEO_SAMSUNG_EXYNOS_GSC=m
 CONFIG_V4L_TEST_DRIVERS=y
 CONFIG_DRM=y
 CONFIG_DRM_EXYNOS=y