powerpc/perf: Add extended regs support for power10 platform

powerpc/perf: Add extended regs support for power10 platform

Include capability flag PERF_PMU_CAP_EXTENDED_REGS for power10 and
expose MMCR3, SIER2, SIER3 registers as part of extended regs. Also
introduce PERF_REG_PMU_MASK_31 to define extended mask value at
runtime for power10.

Suggested-by: Ryan Grimm <[email protected]>
Signed-off-by: Athira Rajeev <[email protected]>
Tested-by: Nageswara R Sastry <[email protected]>
Reviewed-by: Kajol Jain <[email protected]>
Reviewed-and-tested-by: Ravi Bangoria <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]