Merge changes from topic "fvp_dts_rework" into integration

Merge changes from topic "fvp_dts_rework" into integration

* changes:
  fix(fvp_ve): fdts: Fix vexpress,config-bus subnode names
  fix(fvp): fdts: Fix idle-states entry method
  fix(fvp): fdts: fix memtimer subframe addressing
  feat(fvp): fdts: update rtsm_ve DT files from the Linux kernel
  refactor(fvp): fdts: consolidate GICv2 base FVP DT files
  refactor(fvp): fdts: consolidate GICv3 base FVP DT files
  feat(fvp): dts: drop 32-bit .dts files
  refactor(fvp): fdts: merge motherboard .dtsi files
  refactor(fvp_ve): fdts: prepare Cortex-A5 and A7 model DTs
  fix(fvp): fdts: unify and fix PSCI nodes