imx8mp: power-domain: Add PCIe support

Add support for GPCv2 power domains and clock handling for PCIe and
PCIe PHY.

Tested-by: Tim Harvey <tharvey@gateworks.com> #imx8mp-venice*
Tested-by: Adam Ford <aford173@gmail.com> #imx8mp-beacon-kit
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
1 file changed