Merge changes I6b4a4d22,I06bde289,I86e39481,I7ea9b75c into integration

* changes:
  feat(stm32mp1-fdts): use /omit-if-no-ref/ for pins nodes
  feat(st): mandate dtc version 1.4.7
  refactor(st): move mbedtls config files
  refactor(st): add common mk files