configs: Add POWER_CONFIG for machines

Add configs that address differences in naming, polarity, and number of
GPIOs used to control power sequencing and standby reset holds.

These are based on existing per-machine patches to op-pwrctl.

Signed-off-by: Xo Wang <xow@google.com>
Change-Id: I9b1b076cda58899bec466f94ae8a9c87f9ed4124
5 files changed