add cts/rts of uart1 and uart4

Change-Id: I1bd9d27ca102521afc0a7588e69ef89fe01cc704
Reviewed-on: https://tp-biosrd-v02/gerrit/81847
Reviewed-by: Scorpio Chang(張志賢) <Scorpio_Chang@asus.com>
Tested-by: Scorpio Chang(張志賢) <Scorpio_Chang@asus.com>

Author: scorpiochang

arch/arm/boot/dts/rk3288-miniarm.dts

@@ -732,6 +732,8 @@
 };
 
 &uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_xfer>, <&uart1_cts>, <&uart1_rts>;
 	status = "okay";
 };
 
@@ -744,6 +746,8 @@
 };
 
 &uart4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart4_xfer>, <&uart4_cts>, <&uart4_rts>;
 	status = "okay";
 };