mfd: Add rc5t583's gpio in mfd device list

Adding the gpio of RC583 in the list of rc583 mfd devices
to register the gpio driver of RC5T583.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/rc5t583.c b/drivers/mfd/rc5t583.c
index 44afae0..1cb4c35 100644
--- a/drivers/mfd/rc5t583.c
+++ b/drivers/mfd/rc5t583.c
@@ -75,6 +75,7 @@
 	(RC5T583_EXT_PWRREQ1_CONTROL | RC5T583_EXT_PWRREQ2_CONTROL)
 
 static struct mfd_cell rc5t583_subdevs[] = {
+	{.name = "rc5t583-gpio",},
 	{.name = "rc5t583-regulator",},
 	{.name = "rc5t583-rtc",      },
 	{.name = "rc5t583-key",      }