MAINTAINERS: Add more files to the PHY LIBRARY section

Include missing files that are provided by, used, or directly maintained
within the PHY LIBRARY, this include uapi header, header files used by
Device Tree code etc.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index 297e610..a7a392a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5138,12 +5138,20 @@
 M:	Florian Fainelli <f.fainelli@gmail.com>
 L:	netdev@vger.kernel.org
 S:	Maintained
-F:	include/linux/phy.h
-F:	include/linux/phy_fixed.h
-F:	drivers/net/phy/
+F:	Documentation/ABI/testing/sysfs-bus-mdio
+F:	Documentation/devicetree/bindings/net/mdio*
 F:	Documentation/networking/phy.txt
+F:	drivers/net/phy/
 F:	drivers/of/of_mdio.c
 F:	drivers/of/of_net.c
+F:	include/linux/*mdio*.h
+F:	include/linux/of_net.h
+F:	include/linux/phy.h
+F:	include/linux/phy_fixed.h
+F:	include/linux/platform_data/mdio-gpio.h
+F:	include/trace/events/mdio.h
+F:	include/uapi/linux/mdio.h
+F:	include/uapi/linux/mii.h
 
 EXT2 FILE SYSTEM
 M:	Jan Kara <jack@suse.com>