mediatek: fix Unielec U7623 dts in 4.19

remove duplicated pinctrl nodes.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/mediatek/patches-4.19/0227-arm-dts-Add-Unielec-U7623-DTS.patch

@@ -44,7 +44,7 @@ Subject: [PATCH] arm: dts: Add Unielec U7623 DTS
 +};
 --- /dev/null
 +++ b/arch/arm/boot/dts/mt7623a-unielec-u7623-02-emmc.dtsi
-@@ -0,0 +1,366 @@
+@@ -0,0 +1,349 @@
 +/*
 + * Copyright 2018 Kristian Evensen <kristian.evensen@gmail.com>
 + *
@@ -324,23 +324,6 @@ Subject: [PATCH] arm: dts: Add Unielec U7623 DTS
 +		};
 +	};
 +
-+	pwm_pins_a: pwm@0 {
-+		pins_pwm {
-+			pinmux = <MT7623_PIN_203_PWM0_FUNC_PWM0>,
-+				 <MT7623_PIN_204_PWM1_FUNC_PWM1>,
-+				 <MT7623_PIN_205_PWM2_FUNC_PWM2>,
-+				 <MT7623_PIN_206_PWM3_FUNC_PWM3>,
-+				 <MT7623_PIN_207_PWM4_FUNC_PWM4>;
-+		};
-+	};
-+
-+	uart2_pins_b: uart@2 {
-+		pins_dat {
-+			pinmux = <MT7623_PIN_200_URXD2_FUNC_URXD2>,
-+				 <MT7623_PIN_201_UTXD2_FUNC_UTXD2>;
-+		};
-+	};
-+
 +	pcie_default: pcie_pin_default {
 +		pins_cmd_dat {
 +			pinmux = <MT7623_PIN_208_AUD_EXT_CK1_FUNC_PCIE0_PERST_N>,