rdn2/scp_ramfw: Exclude SCMI-Perf Ops by default
Created by: nicola-mazzucato-arm
RDN2 does not require the SCMI-Perf protocol support, but only the FastChannels support.
Set SCP_TARGET_EXCLUDE_SCMI_PERF_PROTOCOL_OPS by default for the scp ramfw.
Change-Id: I38062d1e3a551c37b6f1267fa4935ce9fa3d657d