dt-bindings: soc: grf: add naneng combo phy register compatible

Add Naneng combo phy register compatible.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20220208091326.12495-2-yifeng.zhao@rock-chips.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/soc/rockchip/grf.yaml

@@ -38,6 +38,8 @@ properties:
               - rockchip,rk3399-grf
               - rockchip,rk3399-pmugrf
               - rockchip,rk3568-grf
+              - rockchip,rk3568-pipe-grf
+              - rockchip,rk3568-pipe-phy-grf
               - rockchip,rk3568-pmugrf
               - rockchip,rv1108-grf
               - rockchip,rv1108-pmugrf