ARM: dts: qs600: Add missing pinctrl property for gsbi7 uart

This patch adds missing 2pin uart pinctrl property to gsbi7 uart on
CM-QS600.

Signed-off-by: Srinivas Kandagatla <[e-mail]>
Acked-by: Igor Grinberg <[e-mail]>
Signed-off-by: Andy Gross <[e-mail]>

arch/arm/boot/dts/qcom-apq8064-cm-qs600.dts

···
 			qcom,mode = <GSBI_PROT_I2C_UART>;
 			serial@16640000 {
 				status = "ok";
+				pinctrl-names = "default";
+				pinctrl-0 = <&gsbi7_uart_2pins>;
 			};
 		};