ARM: dts: lpc32xx: add required clocks property to keypad device node

NXP LPC32xx keypad controller requires a clock property to be defined.

The change fixes the driver initialization problem:

  lpc32xx_keys 40050000.key: failed to get clock
  lpc32xx_keys: probe of 40050000.key failed with error -2

Fixes: 93898eb775 ("arm: dts: lpc32xx: add clock properties to device nodes")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>

arch/arm/boot/dts/lpc32xx.dtsi

@@ -462,6 +462,7 @@ timer1: timer@4004c000 {
 			key: key@40050000 {
 				compatible = "nxp,lpc3220-key";
 				reg = <0x40050000 0x1000>;
+				clocks = <&clk LPC32XX_CLK_KEY>;
 				interrupts = <54 IRQ_TYPE_LEVEL_HIGH>;
 				status = "disabled";
 			};