Merge changes from topic "st_fixes" into integration

* changes:
  fix(st-iwdg): remove num_irq
  fix(st-drivers): remove useless field in fixed regul
  fix(st-bsec): remove useless defines in BSEC3
  fix(st-bsec): rename OTPSR field
  fix(st-crypto): do not set IPRST if BUSY flag is present
  fix(st-ddr): bad refresh update level toggle sequence
  fix(st-ddr): remove TODO in STM32MP2 driver
  fix(stm32mp2): correct typo in definition header