stmmac: make the STi Layer compatible to STiH407

This adds the missing compatibility to the STiH407 SoC.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/sti-dwmac.txt

@@ -3,8 +3,8 @@ STMicroelectronics SoC DWMAC glue layer controller
 The device node has following properties.
 
 Required properties:
- - compatible	: Can be "st,stih415-dwmac", "st,stih416-dwmac" or
-   "st,stid127-dwmac".
+ - compatible	: Can be "st,stih415-dwmac", "st,stih416-dwmac",
+   "st,stid127-dwmac", "st,stih407-dwmac".
  - reg		: Offset of the glue configuration register map in system
    configuration regmap pointed by st,syscon property and size.
 

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

@@ -40,6 +40,7 @@ static const struct of_device_id stmmac_dt_ids[] = {
 	{ .compatible = "st,stih415-dwmac", .data = &sti_gmac_data},
 	{ .compatible = "st,stih416-dwmac", .data = &sti_gmac_data},
 	{ .compatible = "st,stid127-dwmac", .data = &sti_gmac_data},
+	{ .compatible = "st,stih407-dwmac", .data = &sti_gmac_data},
 #endif
 #ifdef CONFIG_DWMAC_SOCFPGA
 	{ .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data },