Merge changes from topic "rd_updates" into integration
* changes:
plat/sgi: allow usage of secure partions on rdn2 platform
board/rdv1mc: initialize tzc400 controllers
plat/sgi: allow access to TZC controller on all chips
plat/sgi: define memory regions for multi-chip platforms
plat/sgi: allow access to nor2 flash and system registers from s-el0
plat/sgi: define default list of memory regions for dmc620 tzc
plat/sgi: improve macros defining cper buffer memory region
plat/sgi: refactor DMC-620 error handling SMC function id
plat/sgi: refactor SDEI specific macros