scsi: pm8001: Use module param to set pcs event log severity

scsi: pm8001: Use module param to set pcs event log severity

The pm8001 driver sets pcs event log threshold very high which causes
most of the FW log messages to not be captured. Add a module parameter
to configure pcs event log severity with 3 (medium severity) as the
default.

Co-developed-by: Bhavesh Jashnani <bjashnani@google.com>
Signed-off-by: Bhavesh Jashnani <bjashnani@google.com>
Signed-off-by: Salomon Dushimirimana <salomondush@google.com>
Link: https://lore.kernel.org/r/20241016220944.370539-1-salomondush@google.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>