feat(rd): secure hafnium build for rdfremontcfg1

Add hafnium build support for RD-Fremont-Cfg1 platform. FVP version of
RD-Fremont-Cfg1 support 8 CPUs with 8 GICR frames.

Change-Id: Ie113a60bf9ec443bbfae10552dce3181465d46e4
Signed-off-by: Jerry Wang <Jerry.Wang4@arm.com>
2 files changed