ARM: shmobile: r8a7778: Fix pin control device address in DT

The PFC device is erroneously declared at address 0xfffc000 instead of
0xfffc0000. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7778.dtsi

@@ -114,7 +114,7 @@ gpio4: gpio@ffc44000 {
 
 	pfc: pfc@fffc0000 {
 		compatible = "renesas,pfc-r8a7778";
-		reg = <0xfffc000 0x118>;
+		reg = <0xfffc0000 0x118>;
 	};
 
 	i2c0: i2c@ffc70000 {