board/olpc: move GPIO_SYSFS to common config

It's not specific to XO-1.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/olpc/linux.config

@@ -21,6 +21,7 @@ CONFIG_BLK_DEV_SR=y
 CONFIG_CHR_DEV_SG=y
 CONFIG_MTD=y
 CONFIG_MTD_BLOCK=y
+CONFIG_GPIO_SYSFS=y
 CONFIG_NETDEVICES=y
 CONFIG_LIBERTAS=m
 CONFIG_INPUT_MOUSEDEV=y

board/olpc/xo-1/linux.config

@@ -44,7 +44,6 @@ CONFIG_NVRAM=y
 CONFIG_SCx200_ACB=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_SINGLE=y
-CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_CS5535=y
 CONFIG_THERMAL=y
 CONFIG_WATCHDOG=y