feat(rdfremont): add support for RD-Fremont-Cfg1

Add the required source and header files to support RD-Fremont-Cfg1,
which is a variant of RD-Fremont. RD-Fremont-Cfg1 hosts a smaller mesh
and lower number of cores when compared with RD-Fremont.

Signed-off-by: Shriram K <shriram.k@arm.com>
Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I720b0e76174123c8aab64b39e9468b28614607b9
5 files changed