ARM: dts: Fix LEDs on exynos5422-odroidxu3

The LEDs on Odroid XU3 family boards could not properly probe
because PWM outputs were reduced only to PWM for fan. Fix it
for Odroid XU3 and XU3-Lite boards by switching to usage of
all 4 outputs (although the PWM for MIPI probably is redundant
because board does not have MIPI connector available).

This fixes warnings on dmesg:
[    4.838712] samsung-pwm 12dd0000.pwm: tried to request PWM channel 1 without output
[    4.838725] leds_pwm pwmleds: unable to request PWM for green:mmc0: -22
[    4.838767] leds_pwm: probe of pwmleds failed with error -22

Fixes: b685d540 ("ARM: dts: Add pwm-fan node for exynos5422-odroidxu3")
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi

@@ -472,7 +472,6 @@ &pwm {
 	 */
 	pinctrl-0 = <&pwm0_out &pwm1_out &pwm2_out &pwm3_out>;
 	pinctrl-names = "default";
-	samsung,pwm-outputs = <0>;
 	status = "okay";
 };