ARM: dts: OMAP5: Update keypad reg property

Add missing OMAP keypad reg property information.
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NBenoit Cousson <benoit.cousson@linaro.org>

arch/arm/boot/dts/omap5.dtsi

@@ -427,6 +427,7 @@
 
 		keypad: keypad@4ae1c000 {
 			compatible = "ti,omap4-keypad";
+			reg = <0x4ae1c000 0x400>;
 			ti,hwmods = "kbd";
 		};