mfd: Fix build breakage caused by tps65910 gpio directory move

Signed-off-by: Liam Girdwood <lrg@ti.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b6c2677..0f09c05 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -721,7 +721,7 @@
 
 config MFD_TPS65910
 	bool "TPS65910 Power Management chip"
-	depends on I2C=y
+	depends on I2C=y && GPIOLIB
 	select MFD_CORE
 	select GPIO_TPS65910
 	help