phylib: rename mdio-ofgpio to mdio-gpio

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index d55932a..0318077 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -84,7 +84,7 @@
 
 	  If in doubt, say N.
 
-config MDIO_OF_GPIO
+config MDIO_GPIO
 	tristate "Support for GPIO lib-based bitbanged MDIO buses"
 	depends on MDIO_BITBANG && OF_GPIO
 	---help---