imx6: add gpio sysfs support

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

SVN-Revision: 37934

target/linux/imx6/config-3.10

@@ -84,6 +84,7 @@ CONFIG_DMADEVICES=y
 CONFIG_DMA_ENGINE=y
 CONFIG_DMA_OF=y
 CONFIG_DTC=y
+# CONFIG_EP_OF_EP_RC_SYS is not set
 CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT2_FS_SECURITY=y
@@ -116,6 +117,7 @@ CONFIG_GPIOLIB=y
 CONFIG_GPIO_DEVRES=y
 CONFIG_GPIO_GENERIC=y
 CONFIG_GPIO_MXC=y
+CONFIG_GPIO_SYSFS=y
 # CONFIG_HAMRADIO is not set
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_HAS_DMA=y
@@ -178,7 +180,6 @@ CONFIG_IRQ_WORK=y
 CONFIG_JBD=y
 CONFIG_JBD2=y
 CONFIG_KTIME_SCALAR=y
-CONFIG_KUSER_HELPERS=y
 CONFIG_LOCAL_TIMERS=y
 CONFIG_LZO_COMPRESS=y
 CONFIG_LZO_DECOMPRESS=y