Merge changes I14df5d21,I7f952205,I6f52ec2c,Ibe0cacf8 into integration

* changes:
  feat(stm32mp2-fdts): describe stpmic2 power supplies
  feat(stm32mp2-fdts): add I2C7 pin muxing
  feat(stm32mp2-fdts): add UART and I2C nodes for STM32MP2
  feat(st-pmic): add STPMIC2 driver