net: phy: Add Amlogic Meson GXL Internal PHY support

The Amlogic Meson GXL/GXM families embeds an internal RMII Ethernet PHY.

The PHY acts as a generic PHY but needs a slight configuration right
before it's configuration.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 4d02d8b..e32f1eb 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -55,6 +55,9 @@
 config PHY_MARVELL
 	bool "Marvell Ethernet PHYs support"
 
+config PHY_MESON_GXL
+	bool "Amlogic Meson GXL Internal PHY support"
+
 config PHY_MICREL
 	bool "Micrel Ethernet PHYs support"
 	help