ARM: shmobile: kzm9g dts: Configure the HOME key as wake-up source

Note that from now on any of the pfc8575 gpio keys will wake up the
system, as the pfc8575 cannot mask individual interrupts.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0-kzm9g.dts

@@ -147,6 +147,7 @@ home-key {
 			gpios = <&pcf8575 14 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_HOME>;
 			label = "SW1";
+			gpio-key,wakeup;
 		};
 	};