[ARM] 4376/1: Selects GENERIC_GPIO for ARCH_IXP4XX in Kconfig

Selects GENERIC_GPIO for ARCH_IXP4XX in Kconfig.

IXP4XX has generic GPIO support; however, ARCH_IXP4XX
Kconfig entry currently does not select GENERIC_GPIO like other
arch entries.
Signed-off-by: NMilan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -287,6 +287,7 @@ config ARCH_IXP2000
 config ARCH_IXP4XX
 	bool "IXP4xx-based"
 	depends on MMU
+	select GENERIC_GPIO
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
 	help