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: NPaul Burton <paul.burton@imgtec.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/Kconfig

@@ -965,7 +965,7 @@ config GPIO_ML_IOH
 
 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