forked from Mirrors/opensbi

PMU overflow interrupt should be disabled durinig initial configuration of
counters. They should be enabled while starting counters.
Fixes: 730f01bb41
("lib: sbi: Support sscofpmf extension in OpenSBI")
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>