Merge changes from topic "css_refactor_arm" into integration
* changes:
refactor(console): consolidate console runtime switch
refactor(synquacer): console runtime switch on bl31 exit
refactor(nxp): console runtime switch on bl31 exit
refactor(nvidia): console runtime switch on bl31 exit
refactor(hisilicon): console runtime switch on bl31 exit
refactor(xilinx): console runtime switch on bl31 exit
refactor(mediatek): console runtime switch on bl31 exit
refactor(armada): console runtime switch on bl31 exit
refactor(imx): console runtime switch on bl31 exit
refactor(brcm): console runtime switch on bl31 exit