perf: arm_spe: Use new PMSIDR_EL1 register enums

Now that the SPE register definitions include enums for some PMSIDR_EL1
fields, use them in the driver in place of magic values.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20220825-arm-spe-v8-7-v4-5-327f860daf28@kernel.org


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