media: exynos-gsc: Add compatible for Exynos 5250 and 5420 SoC version

Exynos 5250 and 5420 have different hardware rotation limits.
Since we have to distinguish between these two, we add different
compatible: samsung,exynos5250-gsc and samsung,exynos5420-gsc.
Signed-off-by: NHoegeun Kwon <hoegeun.kwon@samsung.com>
Signed-off-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/devicetree/bindings/media/exynos5-gsc.txt

@@ -3,8 +3,11 @@
 G-Scaler is used for scaling and color space conversion on EXYNOS5 SoCs.
 
 Required properties:
-- compatible: should be "samsung,exynos5-gsc" (for Exynos 5250, 5420 and
-	      5422 SoCs) or "samsung,exynos5433-gsc" (Exynos 5433)
+- compatible: should be one of
+	      "samsung,exynos5250-gsc"
+	      "samsung,exynos5420-gsc"
+	      "samsung,exynos5433-gsc"
+	      "samsung,exynos5-gsc" (deprecated)
 - reg: should contain G-Scaler physical address location and length.
 - interrupts: should contain G-Scaler interrupt number
 
@@ -15,7 +18,7 @@ Optional properties:
 Example:
 
 gsc_0:  gsc@0x13e00000 {
-	compatible = "samsung,exynos5-gsc";
+	compatible = "samsung,exynos5250-gsc";
 	reg = <0x13e00000 0x1000>;
 	interrupts = <0 85 0>;
 };