perf: check return value of armpmu_request_irq()

When the function armpmu_request_irq() failed, goto err

Signed-off-by: Ren Yu <renyu@nfschina.com>
Link: https://lore.kernel.org/r/20220425100436.4881-1-renyu@nfschina.com


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