perf/x86/rapl: Add core energy counter support for AMD CPUs

perf/x86/rapl: Add core energy counter support for AMD CPUs

Add a new "power_core" PMU and "energy-core" event for monitoring
energy consumption by each individual core. The existing energy-cores
event aggregates the energy consumption of CPU cores at the package level.
This new event aligns with the AMD's per-core energy counters.

Tested the package level and core level PMU counters with workloads
pinned to different CPUs.

Results with workload pinned to CPU 4 in core 4 on an AMD Zen4 Genoa
machine:

$ sudo perf stat --per-core -e power_core/energy-core/ -- taskset -c 4 stress-ng --matrix 1 --timeout 5s
stress-ng: info:  [21250] setting to a 5 second run per stressor
stress-ng: info:  [21250] dispatching hogs: 1 matrix
stress-ng: info:  [21250] successful run completed in 5.00s

 Performance counter stats for 'system wide':

S0-D0-C0              1               0.00 Joules power_core/energy-core/
S0-D0-C1              1               0.00 Joules power_core/energy-core/
S0-D0-C2              1               0.00 Joules power_core/energy-core/
S0-D0-C3              1               0.00 Joules power_core/energy-core/
S0-D0-C4              1               8.43 Joules power_core/energy-core/
S0-D0-C5              1               0.00 Joules power_core/energy-core/
S0-D0-C6              1               0.00 Joules power_core/energy-core/
S0-D0-C7              1               0.00 Joules power_core/energy-core/
S0-D1-C8              1               0.00 Joules power_core/energy-core/
S0-D1-C9              1               0.00 Joules power_core/energy-core/
S0-D1-C10             1               0.00 Joules power_core/energy-core/

Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: "Gautham R. Shenoy" <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20241115060805.447565-11-Dhananjay.Ugwekar@amd.com