imx6ul.dtsi missing ipg clock and pgc node

[Stefan Wahren]

Hi,

i ran make dtbs_check for a imx6ull board and noticed that there are 
some warnings:

gpc at 20dc000: 'clocks' is a required property
     From schema: 
/home/stefanw/linux-next-real/Documentation/devicetree/bindings/power/fsl,imx-gpc.yaml
gpc at 20dc000: 'clock-names' is a required property
     From schema: 
/home/stefanw/linux-next-real/Documentation/devicetree/bindings/power/fsl,imx-gpc.yaml
gpc at 20dc000: 'pgc' is a required property
     From schema: 
/home/stefanw/linux-next-real/Documentation/devicetree/bindings/power/fsl,imx-gpc.yaml

According to the i.MX6ULL reference manual the clock and the power gate 
control IP seems to exists. Adding the ipg clock should be trivial, but 
i don't have a clue which power domains are available to pgc. I also 
didn't find anything in the Linux 4.9 vendor tree.

Can anyone help here?

Best regards