feat(neoverse-rd): disable SPMD_SPM_AT_SEL2 for N2/V2 platforms

SPMD_SPM_AT_SEL2 is enabled by default for platforms. As the platforms
based on N2/V2 CPUs don't use SPMD_SPM_AT_SEL2, set its value to 0.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: Ib503c5552e2b8fee928b2392ba40805664d857d7
1 file changed