ramips: backport MT7628 pinmux fixes

According to the datasheet the REFCLK pin is shared with GPIO#37 and
the PERST pin is shared with GPIO#36.

While at it fix a typo inside the pinmux setup code. The function is called
refclk and not reclk.

Update device tree source files accordingly.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/dts/DUZUN-DM06.dts

@@ -74,7 +74,7 @@
 	wm8960_mclk_pins: wm8960_mclk {
 		wm8960_mclk {
 			ralink,group = "refclk";
-			ralink,function = "reclk";
+			ralink,function = "refclk";
 		};
 	};
 };

target/linux/ramips/dts/U7628-01.dtsi

@@ -125,7 +125,7 @@
 &pinctrl {
 	state_default: pinctrl0 {
 		gpio {
-			ralink,group = "gpio", "p0led_an", "p1led_an", "p2led_an", "p3led_an", "p4led_an", "perst", "wdt", "wled_an";
+			ralink,group = "gpio", "p0led_an", "p1led_an", "p2led_an", "p3led_an", "p4led_an", "refclk", "wdt", "wled_an";
 			ralink,function = "gpio";
 		};
 	};

target/linux/ramips/dts/VOCORE2.dtsi

@@ -12,7 +12,7 @@
 &pinctrl {
 	state_default: pinctrl0 {
 		gpio {
-			ralink,group = "wled_an", "perst", "wdt";
+			ralink,group = "wled_an", "refclk", "wdt";
 			ralink,function = "gpio";
 		};
 	};

target/linux/ramips/patches-4.9/0102-MIPS-ralink-Fix-MT7628-pinmux.patch

@@ -0,0 +1,33 @@
+From 8ef4b43cd3794d63052d85898e42424fd3b14d24 Mon Sep 17 00:00:00 2001
+From: Mathias Kresin <dev@kresin.me>
+Date: Thu, 11 May 2017 08:11:14 +0200
+Subject: [PATCH 1/2] MIPS: ralink: Fix MT7628 pinmux
+
+According to the datasheet the REFCLK pin is shared with GPIO#37 and
+the PERST pin is shared with GPIO#36.
+
+Fixes: 53263a1c6852 ("MIPS: ralink: add mt7628an support")
+Signed-off-by: Mathias Kresin <dev@kresin.me>
+Acked-by: John Crispin <john@phrozen.org>
+Cc: Ralf Baechle <ralf@linux-mips.org>
+Cc: linux-mips@linux-mips.org
+Cc: <stable@vger.kernel.org> # 3.19+
+Patchwork: https://patchwork.linux-mips.org/patch/16046/
+Signed-off-by: James Hogan <jhogan@kernel.org>
+---
+ arch/mips/ralink/mt7620.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/arch/mips/ralink/mt7620.c
++++ b/arch/mips/ralink/mt7620.c
+@@ -141,8 +141,8 @@ static struct rt2880_pmx_func i2c_grp_mt
+ 	FUNC("i2c", 0, 4, 2),
+ };
+ 
+-static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 36, 1) };
+-static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 37, 1) };
++static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 37, 1) };
++static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 36, 1) };
+ static struct rt2880_pmx_func wdt_grp_mt7628[] = { FUNC("wdt", 0, 38, 1) };
+ static struct rt2880_pmx_func spi_grp_mt7628[] = { FUNC("spi", 0, 7, 4) };
+ 

target/linux/ramips/patches-4.9/0103-MIPS-ralink-Fix-typo-in-mt7628-pinmux-function

@@ -0,0 +1,31 @@
+From 05a67cc258e75ac9758e6f13d26337b8be51162a Mon Sep 17 00:00:00 2001
+From: Mathias Kresin <dev@kresin.me>
+Date: Thu, 11 May 2017 08:11:15 +0200
+Subject: [PATCH 2/2] MIPS: ralink: Fix typo in mt7628 pinmux function
+
+There is a typo inside the pinmux setup code. The function is called
+refclk and not reclk.
+
+Fixes: 53263a1c6852 ("MIPS: ralink: add mt7628an support")
+Signed-off-by: Mathias Kresin <dev@kresin.me>
+Acked-by: John Crispin <john@phrozen.org>
+Cc: Ralf Baechle <ralf@linux-mips.org>
+Cc: linux-mips@linux-mips.org
+Cc: <stable@vger.kernel.org> # 3.19+
+Patchwork: https://patchwork.linux-mips.org/patch/16047/
+Signed-off-by: James Hogan <jhogan@kernel.org>
+---
+ arch/mips/ralink/mt7620.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/ralink/mt7620.c
++++ b/arch/mips/ralink/mt7620.c
+@@ -141,7 +141,7 @@ static struct rt2880_pmx_func i2c_grp_mt
+ 	FUNC("i2c", 0, 4, 2),
+ };
+ 
+-static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 37, 1) };
++static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("refclk", 0, 37, 1) };
+ static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 36, 1) };
+ static struct rt2880_pmx_func wdt_grp_mt7628[] = { FUNC("wdt", 0, 38, 1) };
+ static struct rt2880_pmx_func spi_grp_mt7628[] = { FUNC("spi", 0, 7, 4) };