ARM: dts: exynos_dsim: add exynos5410 compatible to DT bindings

This patch adds relevant to exynos5410 compatible
for exynos5410 / 5420 / 5440 SoCs support.
Signed-off-by: YoungJun Cho <yj44.cho@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

Documentation/devicetree/bindings/video/exynos_dsim.txt

 Exynos MIPI DSI Master
 
 Required properties:
-  - compatible: "samsung,exynos4210-mipi-dsi"
+  - compatible: value should be one of the following
+		"samsung,exynos4210-mipi-dsi" /* for Exynos4 SoCs */
+		"samsung,exynos5410-mipi-dsi" /* for Exynos5410/5420/5440 SoCs */
   - reg: physical base address and length of the registers set for the device
   - interrupts: should contain DSI interrupt
   - clocks: list of clock specifiers, must contain an entry for each required