ARM: dts: dra7-evm: Add mmc2 node for eMMC support

Add mmc2 dt node to dra7-evm board
and model eMMC vcc as fixed regulator.
Signed-off-by: NBalaji T K <balajitk@ti.com>
Acked-by: NSekhar Nori <nsekhar@ti.com>
Signed-off-by: NBenoit Cousson <bcousson@baylibre.com>

arch/arm/boot/dts/dra7-evm.dts

@@ -17,6 +17,13 @@
 		device_type = "memory";
 		reg = <0x80000000 0x60000000>; /* 1536 MB */
 	};
+
+	mmc2_3v3: fixedregulator-mmc2 {
+		compatible = "regulator-fixed";
+		regulator-name = "mmc2_3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
 };
 
 &dra7_pmx_core {
@@ -256,3 +263,9 @@
 	vmmc-supply = <&ldo1_reg>;
 	bus-width = <4>;
 };
+
+&mmc2 {
+	status = "okay";
+	vmmc-supply = <&mmc2_3v3>;
+	bus-width = <8>;
+};