drivers/perf: hisi: Extract initialization of "cpa_pmu->pmu"

mainline inclusion
from mainline-v6.3-rc1
commit e126f6f4
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I77IH6
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e126f6f42f89baee09e088ab6bc48f83ac3a0eae



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Use hisi_pmu_init() function to simplify initialization of "cpa_pmu->pmu".

Signed-off-by: Junhao He <hejunhao3@huawei.com>
Link: https://lore.kernel.org/r/20230119100307.3660-4-hejunhao3@huawei.com


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