regmap: Updates for v5.10

Quite a busy release for regmap, mostly support for new features useful
on fairly small subsets of devices.  The user visible features are:

 - A new API for registering large numbers of regmap fields at once.
 - Support for Intel AVMM buses connected via SPI.
 - Support for 12/20 address/value layouts.
 - Support for yet another scheme for acknowledging interrupts used on
   some Qualcomm devices.
Merge remote-tracking branch 'regmap/for-5.10' into regmap-next