drivers/perf: Replace spin_lock_irqsave to spin_lock

There is no need to do spin_lock_irqsave in context of hard IRQ, so
replace them with spin_lock.

Signed-off-by: Qi Liu <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1612863742-1551-1-git-send-email-liuqi115@huawei.com


Signed-off-by: Will Deacon <will@kernel.org>