feat(plat/mediatek/mt8186): add pwrap and pmic driver

1. Add 8186 pwrap driver to access pmic.
2. Add 6366 pmic driver to support clean PWRHOLD.

TEST=build pass
BUG=b:202871018

Signed-off-by: James Lo <james.lo@mediatek.corp-partner.google.com>
Change-Id: I3bc90460a6a55dff8d3293e04482abcad789bbb2
6 files changed