drivers/perf: apple_m1: Add mapping for branch counters

Apple released their performance counters definition in
/usr/share/kpep/a14.plist file on macOS. The file lists the branch
counters (number of branch instructions and branch mispredictions):

"INST_BRANCH" => {
  "counters_mask" => 224
  "description" => "Retired branch instructions including calls and
returns"
  "number" => 141
}

and

"BRANCH_MISPRED_NONSPEC" => {
  "counters_mask" => 224
  "description" => "Retired branch instructions including calls and
returns that mispredicted"
  "number" => 203
}

In this commit, the performance counters numbered 0x8d(141) and
0xcb(203) are renamed to their actual names and the mappings from
generalized performence event types in `enum perf_hw_id` to hardware
performance counters are added respectively.

Signed-off-by: Jiajie Chen <c@jia.je>

Author: jiegec

drivers/perf/apple_m1_cpu_pmu.c

@@ -168,6 +168,8 @@ static const unsigned m1_pmu_perf_map[PERF_COUNT_HW_MAX] = {
 	PERF_MAP_ALL_UNSUPPORTED,
 	[PERF_COUNT_HW_CPU_CYCLES]		= M1_PMU_PERFCTR_CORE_ACTIVE_CYCLE,
 	[PERF_COUNT_HW_INSTRUCTIONS]		= M1_PMU_PERFCTR_INST_ALL,
+	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS]	= M1_PMU_PERFCTR_INST_BRANCH,
+	[PERF_COUNT_HW_BRANCH_MISSES]		= M1_PMU_PERFCTR_BRANCH_MISPRED_NONSPEC,
 };
 
 /* sysfs definitions */