perf: arm_cspmu: Add missing MODULE_DEVICE_TABLE

Add missing MODULE_DEVICE_TABLE definition to generate modalias, which
enables module autoloading.

Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230615232630.304870-1-ilkka@os.amperecomputing.com


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