ARM: dts: apq8064: add missing gsbi7 uart pinctrl

This patch adds missing gsbi7 uart pinctrl, this is the default debug
uart on most boards.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <agross@codeaurora.org>

arch/arm/boot/dts/qcom-apq8064.dtsi

@@ -140,6 +140,20 @@ mux {
 					function = "gsbi6";
 				};
 			};
+
+			gsbi7_uart_2pins: gsbi7_uart_2pins {
+				mux {
+					pins = "gpio82", "gpio83";
+					function = "gsbi7";
+				};
+			};
+
+			gsbi7_uart_4pins: gsbi7_uart_4pins {
+				mux {
+					pins = "gpio82", "gpio83", "gpio84", "gpio85";
+					function = "gsbi7";
+				};
+			};
 		};
 
 		intc: interrupt-controller@2000000 {