MLK-22192 imx8mn: Add variant parts support

MLK-22192 imx8mn: Add variant parts support

According to datasheet, there are totally 6 variant parts for imx8mn:
Quad, Dual, Solo with core number changed.
QuadLite, DualLite, SoloLite with core number changed and GPU disabled.

Add the support for these variant parts
1. Recognize the variant parts according to fuse
2. Power down disabled cores
3. Remove the cores node and disable GPU node from kernel DTB before
   entering kernel.
4. Since the mscale dummy id has been used out, increase one more bit
   (bit 8) for cpu id.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 144bd9ce223ead71e1726bea510242a3166f66ce)