Merge changes from topic "st_fixes" into integration

* changes:
  fix(stpmic1): fix power switches activation
  fix(stpmic1): update error cases return
  refactor(stpmic1): use BIT and GENMASK helpers
  fix(stm32mp1_clk): keep RTC clock always on
  fix(stm32mp1_clk): set other clocks as always on