ARM: shmobile: sh73a0: Add pin control device to device tree

Add a pfc node to the sh73a0 device tree and remove manual pinmux
initialization from the corresponding board files.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/boot/dts/sh73a0.dtsi b/arch/arm/boot/dts/sh73a0.dtsi
index b977502..86e79fe 100644
--- a/arch/arm/boot/dts/sh73a0.dtsi
+++ b/arch/arm/boot/dts/sh73a0.dtsi
@@ -222,4 +222,12 @@
 		cap-sd-highspeed;
 		status = "disabled";
 	};
+
+	pfc: pfc@e6050000 {
+		compatible = "renesas,pfc-sh73a0";
+		reg = <0xe6050000 0x8000>,
+		      <0xe605801c 0x1c>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
 };