drm/exynos: hdmi: make local symbols static

Make local symbols static, because these are used only in this
file.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_hdmi.c

@@ -204,11 +204,11 @@ struct hdmiphy_config {
 	u8 conf[32];
 };
 
-struct hdmi_driver_data exynos4212_hdmi_driver_data = {
+static struct hdmi_driver_data exynos4212_hdmi_driver_data = {
 	.type	= HDMI_TYPE14,
 };
 
-struct hdmi_driver_data exynos5_hdmi_driver_data = {
+static struct hdmi_driver_data exynos5_hdmi_driver_data = {
 	.type	= HDMI_TYPE14,
 };