ARM: gr8: Add missing pwm channel 1 pin

The PWM controller has two different channels, but only the first pin was
exposed in the DTSI. Add the other one.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun5i-gr8.dtsi

@@ -854,6 +854,13 @@ pwm0_pins_a: pwm0@0 {
 				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
 			};
 
+			pwm1_pins: pwm1 {
+				allwinner,pins = "PG13";
+				allwinner,function = "pwm1";
+				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+			};
+
 			spdif_tx_pins_a: spdif@0 {
 				allwinner,pins = "PB10";
 				allwinner,function = "spdif";