feat(neoverse-rd): disable SPMD_SPM_AT_SEL2 for A75/V1/N1 platforms

SPMD_SPM_AT_SEL2 is enabled by default for platforms. As the platforms
based on A75/V1/N1 CPUs don't use SPMD_SPM_AT_SEL2, set its value to 0.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I59703ddd769f61778ea06cc183e1b163369281f1
4 files changed