ARM: dts: gemini: Fix up confused pin settings

The SL93512r board has its pin muxing set up for the wrong
ASIC: SL3516 instead of SL3512 that it is using. Fix it
up and reference the right GPIO for the WPS button.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/gemini-sl93512r.dts

@@ -36,8 +36,8 @@ button-wps {
 			wakeup-source;
 			linux,code = <KEY_WPS_BUTTON>;
 			label = "WPS";
-			/* Conflict with NAND flash */
-			gpios = <&gpio0 17 GPIO_ACTIVE_LOW>;
+			/* Conflicts with TVC and extended flash */
+			gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
 		};
 
 		button-setup {
@@ -180,17 +180,20 @@ partition@fe0000 {
 		syscon: syscon@40000000 {
 			pinctrl {
 				/*
-				 * gpio0egrp cover line 16 used by HD LED
-				 * gpio0fgrp cover line 17, 18 used by wireless LED and reset button
-				 * gpio0hgrp cover line 21, 22 used by MDIO for Marvell PHY
-				 * gpio0kgrp cover line 31 used by USB LED
+				 * gpio0agrp cover line 0, used by WPS button
+				 * gpio0fgrp cover line 16 used by HD LED
+				 * gpio0ggrp cover line 17, 18 used by wireless LAN LED and
+				 * reset button OR USB ID select on 17 and USB VBUS select
+				 * on 18. (Confusing.)
+				 * gpio0igrp cover line 21, 22 used by MDIO for Marvell PHY
 				 */
 				gpio0_default_pins: pinctrl-gpio0 {
 					mux {
 						function = "gpio0";
-						groups = "gpio0egrp",
+						groups = "gpio0agrp",
 						"gpio0fgrp",
-						"gpio0hgrp";
+						"gpio0ggrp",
+						"gpio0igrp";
 					};
 				};
 				/*