drivers: net: cpsw-phy-sel: add am43xx platform support

AM43xx phy mode selection is similar to AM33xx platform, so adding only
the compatibility string to the driver
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/cpsw-phy-sel.txt

@@ -4,6 +4,7 @@ TI CPSW Phy mode Selection Device Tree Bindings
 Required properties:
 - compatible		: Should be "ti,am3352-cpsw-phy-sel" for am335x platform and
 			  "ti,dra7xx-cpsw-phy-sel" for dra7xx platform
+			  "ti,am43xx-cpsw-phy-sel" for am43xx platform
 - reg			: physical base address and size of the cpsw
 			  registers map
 - reg-names		: names of the register map given in "reg" node

drivers/net/ethernet/ti/cpsw-phy-sel.c

@@ -167,6 +167,10 @@ static const struct of_device_id cpsw_phy_sel_id_table[] = {
 		.compatible	= "ti,dra7xx-cpsw-phy-sel",
 		.data		= &cpsw_gmii_sel_dra7xx,
 	},
+	{
+		.compatible	= "ti,am43xx-cpsw-phy-sel",
+		.data		= &cpsw_gmii_sel_am3352,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, cpsw_phy_sel_id_table);