ARCv2: [axs103_smp] Enable perf

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARCv2: [hs] SMP configs for standalone nsim

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARCv2: optim string routines cleanups

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>