ARM: dts: imx53-ppd: Remove unnecessary #address/#size-cells

Remove unnecessary #address-cells/#size-cells to fix the following
DTC warnings:

arch/arm/boot/dts/imx53-ppd.dtb: Warning (avoid_unnecessary_addr_size): /power-gpio-keys: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property
arch/arm/boot/dts/imx53-ppd.dtb: Warning (avoid_unnecessary_addr_size): /touch-lock-key: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53-ppd.dts

@@ -180,8 +180,6 @@
 
 	power-gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		power-button {
 			label = "Power button";
@@ -192,8 +190,6 @@
 
 	touch-lock-key {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		touch-lock-button {
 			label = "Touch lock button";