Merge changes I38d7378a,I377f250a,If8b2bdbb,Ia6d6ac8a into lts-v2.10

* changes:
  docs(changelog): changelog for lts-v2.10.1 release
  fix(cpus): workaround for Cortex-A715 erratum 2561034
  feat(spmd): initialize SCR_EL3.EEL2 bit at RESET
  fix(cpus): workaround for Cortex X3 erratum 2641945