[PATCH] net: hisilicon: fix binding document of mdio

[huangdaode]

This patch fixes explain the occasion of "hisilcon,mdio" according to
Arnd's comments. specify it is only used for hip04.

First, please give your commnents.

Signed-off-by: huangdaode <huangdaode at hisilicon.com>
---
 Documentation/devicetree/bindings/net/hisilicon-hns-mdio.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/hisilicon-hns-mdio.txt b/Documentation/devicetree/bindings/net/hisilicon-hns-mdio.txt
index 9c23fdf..f650e78 100644
--- a/Documentation/devicetree/bindings/net/hisilicon-hns-mdio.txt
+++ b/Documentation/devicetree/bindings/net/hisilicon-hns-mdio.txt
@@ -1,7 +1,9 @@
 Hisilicon MDIO bus controller
 
 Properties:
-- compatible: "hisilicon,mdio","hisilicon,hns-mdio".
+- compatible: can be one of "hisilicon,hns-mdio","hisilicon,mdio",
+  for hip04 board, please use "hisilicon,mdio",
+  other boards, "hisilicon,hns-mdio" is OK.
 - reg: The base address of the MDIO bus controller register bank.
 - #address-cells: Must be <1>.
 - #size-cells: Must be <0>.  MDIO addresses have no size component.
-- 
1.9.1