ARM: dts: exynos: Add exynos5420-fimd compatible

This patch changes the compatible of Exynos5420 fimd
to "exynos5420-fimd". To support MIC bypass from display
path, the new compatible is introduced for Exynos5420.

Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: NChanho Park <chanho61.park@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/boot/dts/exynos5420.dtsi

@@ -1199,6 +1199,7 @@
 };
 
 &fimd {
+	compatible = "samsung,exynos5420-fimd";
 	clocks = <&clock CLK_SCLK_FIMD1>, <&clock CLK_FIMD1>;
 	clock-names = "sclk_fimd", "fimd";
 	power-domains = <&disp_pd>;