staging: hikey9xx: phy-hi3670-usb3.txt: use a consistent namespace

While this driver is not used yet, use a more consistent namespace,
similar to the PHY layer for Kirin 960 (hi3660).
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/49c2f648516e62d75d339edf42a029bac138e6c0.1600338981.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/hikey9xx/phy-hi3670-usb3.txt

@@ -2,7 +2,7 @@ Hisilicon Kirin970 usb PHY
 -----------------------
 
 Required properties:
-- compatible: should be "hisilicon,kirin970-usb-phy"
+- compatible: should be "hisilicon,hi3670-usb-phy"
 - #phy-cells: must be 0
 - hisilicon,pericrg-syscon: phandle of syscon used to control phy.
 - hisilicon,pctrl-syscon: phandle of syscon used to control phy.
@@ -14,7 +14,7 @@ Refer to phy/phy-bindings.txt for the generic PHY binding properties
 
 Example:
 	usb_phy: usbphy {
-		compatible = "hisilicon,kirin970-usb-phy";
+		compatible = "hisilicon,hi3670-usb-phy";
 		#phy-cells = <0>;
 		hisilicon,pericrg-syscon = <&crg_ctrl>;
 		hisilicon,pctrl-syscon = <&pctrl>;