regulator: Updates for v5.4

A small update for the regualtor API for this cycle, some small fixes
and a bunch of new devices but none of them very big.  The most stand
out thing is the regulator-fixed-clock driver which is for regulators
where the enable control is done by using a clock instead of a GPIO or
register write, a novel hardware design that had not previously come up.

 - Added a keyword pattern for regulator_get_optional() since usage of
   that API generally needs extra review.
 - Operating mode and suspend state support for act8865.
 - New device support for Active Semiconductor ACT8600 chargers,
   Mediatek MT6358, Qualcomm SM8150, regulator-fixed-clock, and
   Synoptics SY20276, SY20278 and SY8824E.
Merge branch 'regulator-5.4' into regulator-next