gpio: pch: allow build on MIPS platforms

Allow the pch_gpio driver to be built for MIPS platforms, in preparation
for use on the MIPS Boston board.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 30d8bd3..535c4c4 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -965,7 +965,7 @@
 
 config GPIO_PCH
 	tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
-	depends on PCI && (X86_32 || COMPILE_TEST)
+	depends on PCI && (X86_32 || MIPS || COMPILE_TEST)
 	select GENERIC_IRQ_CHIP
 	help
 	  This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff