kirkwood: enable GPIO sysfs interface

SVN-Revision: 31667

target/linux/kirkwood/config-3.3

@@ -57,6 +57,7 @@ CONFIG_GENERIC_IRQ_CHIP=y
 CONFIG_GENERIC_IRQ_SHOW=y
 CONFIG_GENERIC_PCI_IOMAP=y
 CONFIG_GPIOLIB=y
+CONFIG_GPIO_SYSFS=y
 # CONFIG_HAMRADIO is not set
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_HAS_DMA=y