pinctrl: berlin: guard sub-directory with CONFIG_PINCTRL_BERLIN

CONFIG_PINCTRL_BERLIN is more suitable than CONFIG_ARCH_BERLIN
to guard the drivers/pinctrl/berlin/ directory.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 738cb49..17c0206 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -41,7 +41,7 @@
 obj-$(CONFIG_PINCTRL_ZYNQ)	+= pinctrl-zynq.o
 
 obj-$(CONFIG_ARCH_BCM)		+= bcm/
-obj-$(CONFIG_ARCH_BERLIN)	+= berlin/
+obj-$(CONFIG_PINCTRL_BERLIN)	+= berlin/
 obj-y				+= freescale/
 obj-$(CONFIG_X86)		+= intel/
 obj-$(CONFIG_PLAT_ORION)        += mvebu/