feat(imx8m): move the gpc reg & macro to a separate header file

move the gpc reg offset, bit define & macro to a separate header
file for code reuse.

This fixes suspend to mem on i.MX8M Plus too, since the register
layout is different there.

Change-Id: Ibec60c3a68ffa8c378de5334577a7b0e463ca875
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Marek Vasut <marex@denx.de> # Upgrade to latest, update commit message
2 files changed