arm: dts: lpc32xx: add clocks property to Motor Control PWM device tree node

Motor Control PWM depends on its own supply clock, the clock gate control
is present in TIMCLK_CTRL1 register.

Fixes: b7d41c9 ("ARM: LPC32xx: Add the motor PWM to base dts file")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>

Author: vzapolskiy

arch/arm/boot/dts/nxp/lpc/lpc32xx.dtsi

@@ -322,6 +322,7 @@
 			mpwm: pwm@400e8000 {
 				compatible = "nxp,lpc3220-motor-pwm";
 				reg = <0x400e8000 0x78>;
+				clocks = <&clk LPC32XX_CLK_MCPWM>;
 				#pwm-cells = <3>;
 				status = "disabled";
 			};