perf/arm_dmc620: Remove duplicate format attribute #defines

These were copied from the SPE driver, but now they're in the arm_pmu.h
header so delete them and use the header instead.

Signed-off-by: James Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20231211161331.1277825-8-james.clark@arm.com


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