* changes:
doc: Update list of supported FVP platforms
board/rdn2: add board support for rdn2 platform
plat/arm/sgi: adapt to changes in memory map
plat/arm/sgi: add platform id value for rdn2 platform
plat/arm/sgi: platform definitions for upcoming platforms
plat/arm/sgi: refactor header file inclusions
plat/arm/sgi: refactor the inclusion of memory mapping