pinctrl: berlin: add the berlin4ct pinctrl driver

Add the pin-controller driver for Marvell Berlin BG4CT SoC, with definition
of its groups and functions. This uses the core Berlin pinctrl driver.
Signed-off-by: NJisheng Zhang <jszhang@marvell.com>
Acked-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/berlin/Kconfig

@@ -17,4 +17,9 @@ config PINCTRL_BERLIN_BG2Q
 	bool
 	select PINCTRL_BERLIN
 
+config PINCTRL_BERLIN_BG4CT
+	bool "Marvell berlin4ct pin controller driver"
+	depends on OF
+	select PINCTRL_BERLIN
+
 endif

drivers/pinctrl/berlin/Makefile

@@ -2,3 +2,4 @@ obj-$(CONFIG_PINCTRL_BERLIN)		+= berlin.o
 obj-$(CONFIG_PINCTRL_BERLIN_BG2)	+= berlin-bg2.o
 obj-$(CONFIG_PINCTRL_BERLIN_BG2CD)	+= berlin-bg2cd.o
 obj-$(CONFIG_PINCTRL_BERLIN_BG2Q)	+= berlin-bg2q.o
+obj-$(CONFIG_PINCTRL_BERLIN_BG4CT)	+= berlin-bg4ct.o