drm/exynos/hdmi: constify global variables

These variables should not be modified.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_hdmi.c

@@ -511,15 +511,15 @@ static const struct hdmiphy_config hdmiphy_5420_configs[] = {
 	},
 };
 
-static const char *hdmi_clk_gates4[] = {
+static const char * const hdmi_clk_gates4[] = {
 	"hdmi", "sclk_hdmi"
 };
 
-static const char *hdmi_clk_muxes4[] = {
+static const char * const hdmi_clk_muxes4[] = {
 	"sclk_pixel", "sclk_hdmiphy", "mout_hdmi"
 };
 
-static struct hdmi_driver_data exynos5420_hdmi_driver_data = {
+static const struct hdmi_driver_data exynos5420_hdmi_driver_data = {
 	.type		= HDMI_TYPE14,
 	.phy_confs	= hdmiphy_5420_configs,
 	.phy_conf_count	= ARRAY_SIZE(hdmiphy_5420_configs),
@@ -528,7 +528,7 @@ static struct hdmi_driver_data exynos5420_hdmi_driver_data = {
 	.clk_muxes	= INIT_ARRAY_SPEC(hdmi_clk_muxes4),
 };
 
-static struct hdmi_driver_data exynos4212_hdmi_driver_data = {
+static const struct hdmi_driver_data exynos4212_hdmi_driver_data = {
 	.type		= HDMI_TYPE14,
 	.phy_confs	= hdmiphy_v14_configs,
 	.phy_conf_count	= ARRAY_SIZE(hdmiphy_v14_configs),
@@ -537,7 +537,7 @@ static struct hdmi_driver_data exynos4212_hdmi_driver_data = {
 	.clk_muxes	= INIT_ARRAY_SPEC(hdmi_clk_muxes4),
 };
 
-static struct hdmi_driver_data exynos4210_hdmi_driver_data = {
+static const struct hdmi_driver_data exynos4210_hdmi_driver_data = {
 	.type		= HDMI_TYPE13,
 	.phy_confs	= hdmiphy_v13_configs,
 	.phy_conf_count	= ARRAY_SIZE(hdmiphy_v13_configs),