IB/hfi1: Fix checks for Offline transient state

In goto_offline() function pstate is masked by 0xff when compared
to PLS_OFFLINE state. Mask should be 0xf0, since upper 4 bits
specify the "major" state.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/chip.c

@@ -10233,7 +10233,7 @@ static int goto_offline(struct hfi1_pportdata *ppd, u8 rem_reason)
 	if (pstate == PLS_OFFLINE) {
 		do_transition = 0;	/* in right state */
 		do_wait = 0;		/* ...no need to wait */
-	} else if ((pstate & 0xff) == PLS_OFFLINE) {
+	} else if ((pstate & 0xf0) == PLS_OFFLINE) {
 		do_transition = 0;	/* in an offline transient state */
 		do_wait = 1;		/* ...wait for it to settle */
 	} else {