feat(neoverse-rd): add scope for RD-Fremont variants

As RD-Fremont and its variants would need a dedicated scope for use,
define the scope 'rdfremont' under the subsection within Neoverse-RD
platforms.

Change-Id: I7066824a33edd893e187ec397298b49392ac35da
Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
1 file changed