scsi: megaraid_sas: Bail out the driver load if ld_list_query fails

Error handling: Bail out the driver load if key FW cmds (LD_LIST) are
not return successful.  Clean up error handling in megasas_init_fw.

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>