feat(neoverse-rd): enable AMU if supported by the platform

Set build-option ENABLE_FEAT_AMU to 2 for RD-V1 and RD-V1-MC so that AMU
is enabled if the feature is implemented on these platforms. This would
ensure that lower ELs could access system registers relevant to AMU
without causing a trap to EL3.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I4d34db0c102c786f34103746064e22600d28da33
2 files changed