Add the documentation for the rk3568-usb2phy-grf node, which is separate
from the usb2phy node on this chip.

Signed-off-by: Peter Geis <redacted>
---
 Documentation/devicetree/bindings/soc/rockchip/grf.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
index fa010df51a5c..3b0e06b6ea61 100644
--- a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
+++ b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml

@@ -16,6 +16,7 @@ properties:
           - enum:
               - rockchip,rk3288-sgrf