perf: arm: enable pmuserenr [1/1]

perf: arm: enable pmuserenr [1/1]

PD#SWPL-4673

Problem:
userspace can't access perf monitor cnt with "mrc ... c9,c13,0"

Solution:
actually userspace should check perf monitor cnt access permissions first
before use, so this is a workround.
enable pmuserenr with "mcr ... c9,c14,0" in several places:
1, perf probe
2, cpu idle (state>0) exit
3, cpu online
4, system resume after suspend

Verify:
u212

Change-Id: Ib09682d1d47545dfef8b088283ddbbf390630d3e
Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>