scsi: pm8001: Reject firmware update in fatal error state

scsi: pm8001: Reject firmware update in fatal error state

pm8001_store_update_fw() allows a firmware update request even when the
controller has already entered a fatal error state.

Firmware update is not valid once the controller is in that state, and
attempting it can lead to a call trace. Reject the request early by
checking controller_fatal_error, set the firmware status to
FAIL_PARAMETERS, and return -EINVAL.

Signed-off-by: Kumar Meiyappan <kumar.meiyappan@microchip.com>
Signed-off-by: Sagar Biradar <sagar.biradar@microchip.com>
Link: https://patch.msgid.link/20260416153757.414896-1-sagar.biradar@microchip.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>