ipq40xx: add missing label for cm520 (#3935)

target/linux/ipq40xx/files-4.14/arch/arm/boot/dts/qcom-ipq4019-cm520-79f.dts

@@ -14,7 +14,6 @@
 		led-failsafe = &led_sys;
 		led-running = &led_sys;
 		led-upgrade = &led_sys;
-		serial0 = &blsp1_uart1;
 	};
 
 	chosen {
@@ -191,8 +190,10 @@
 
 &blsp1_uart1 {
 	status = "okay";
-	pinctrl-0 = <&serial_0_pins>;
-	pinctrl-names = "default";
+};
+
+&blsp1_uart2 {
+	status = "okay";
 };
 
 &cryptobam {
@@ -242,12 +243,6 @@
 };
 
 &tlmm {
-	serial_0_pins: serial0-pinmux {
-		pins = "gpio16", "gpio17";
-		function = "blsp_uart0";
-		bias-disable;
-	};
-
 	mdio_pins: mdio_pinmux {
 		mux_1 {
 			pins = "gpio6";

target/linux/ipq40xx/files-4.19/arch/arm/boot/dts/qcom-ipq4019-cm520-79f.dts

@@ -14,7 +14,6 @@
 		led-failsafe = &led_sys;
 		led-running = &led_sys;
 		led-upgrade = &led_sys;
-		serial0 = &blsp1_uart1;
 	};
 
 	chosen {
@@ -191,8 +190,10 @@
 
 &blsp1_uart1 {
 	status = "okay";
-	pinctrl-0 = <&serial_0_pins>;
-	pinctrl-names = "default";
+};
+
+&blsp1_uart2 {
+	status = "okay";
 };
 
 &cryptobam {
@@ -242,12 +243,6 @@
 };
 
 &tlmm {
-	serial_0_pins: serial0-pinmux {
-		pins = "gpio16", "gpio17";
-		function = "blsp_uart0";
-		bias-disable;
-	};
-
 	mdio_pins: mdio_pinmux {
 		mux_1 {
 			pins = "gpio6";

target/linux/ipq40xx/patches-4.14/996-add-blsp1-uart2-label.patch

+--- a/arch/arm/boot/dts/qcom-ipq4019.dtsi
++++ b/arch/arm/boot/dts/qcom-ipq4019.dtsi
+@@ -387,7 +387,7 @@
+ 			dma-names = "rx", "tx";
+ 		};
+ 
+-		serial@78b0000 {
++		blsp1_uart2: serial@78b0000 {
+ 			compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
+ 			reg = <0x78b0000 0x200>;
+ 			interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;