scsi: mpt3sas: Signedness bug in _base_get_diag_triggers()

The "trigger_flags" variable needs to be signed for the error checking to
work.

Link: https://lore.kernel.org/r/X9DZH37bYPHwSQRP@mwanda
Fixes: aec93e8 ("scsi: mpt3sas: Add persistent trigger pages support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -5027,7 +5027,7 @@ _base_check_for_trigger_pages_support(struct MPT3SAS_ADAPTER *ioc)
 static void
 _base_get_diag_triggers(struct MPT3SAS_ADAPTER *ioc)
 {
-	u16 trigger_flags;
+	int trigger_flags;
 
 	/*
 	 * Default setting of master trigger.