ramips: add rt3352 SPI_CS1 pinmux

The rt3352 has a pin that can be used as second spi chip select,
watchdog reset or GPIO. The pinmux setup was missing the definition of
said pin but it is already used in the SoC dtsi.

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

target/linux/ramips/patches-4.14/0001-MIPS-ralink-Add-rt3352-SPI_CS1-pinmux.patch

@@ -0,0 +1,45 @@
+From 35d017947401d9f449a7e55e52506744e0c62577 Mon Sep 17 00:00:00 2001
+From: Mathias Kresin <dev@kresin.me>
+Date: Wed, 22 Aug 2018 22:38:06 +0200
+Subject: [PATCH] MIPS: ralink: Add rt3352 SPI_CS1 pinmux
+
+The rt3352 has a pin that can be used as second spi chip select,
+watchdog reset or GPIO. The pinmux setup was missing the definition of
+said pin.
+
+The pin is configured via the same bit on rt5350, so reuse the existing
+macro.
+
+Signed-off-by: Mathias Kresin <dev@kresin.me>
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+Patchwork: https://patchwork.linux-mips.org/patch/20301/
+Cc: John Crispin <john@phrozen.org>
+Cc: Ralf Baechle <ralf@linux-mips.org>
+Cc: James Hogan <jhogan@kernel.org>
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+---
+ arch/mips/ralink/rt305x.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/arch/mips/ralink/rt305x.c
++++ b/arch/mips/ralink/rt305x.c
+@@ -49,6 +49,10 @@ static struct rt2880_pmx_func rgmii_func
+ static struct rt2880_pmx_func rt3352_lna_func[] = { FUNC("lna", 0, 36, 2) };
+ static struct rt2880_pmx_func rt3352_pa_func[] = { FUNC("pa", 0, 38, 2) };
+ static struct rt2880_pmx_func rt3352_led_func[] = { FUNC("led", 0, 40, 5) };
++static struct rt2880_pmx_func rt3352_cs1_func[] = {
++	FUNC("spi_cs1", 0, 45, 1),
++	FUNC("wdg_cs1", 1, 45, 1),
++};
+ 
+ static struct rt2880_pmx_group rt3050_pinmux_data[] = {
+ 	GRP("i2c", i2c_func, 1, RT305X_GPIO_MODE_I2C),
+@@ -75,6 +79,7 @@ static struct rt2880_pmx_group rt3352_pi
+ 	GRP("lna", rt3352_lna_func, 1, RT3352_GPIO_MODE_LNA),
+ 	GRP("pa", rt3352_pa_func, 1, RT3352_GPIO_MODE_PA),
+ 	GRP("led", rt3352_led_func, 1, RT5350_GPIO_MODE_PHY_LED),
++	GRP("spi_cs1", rt3352_cs1_func, 2, RT5350_GPIO_MODE_SPI_CS1),
+ 	{ 0 }
+ };
+