[SCSI] qla2xxx: Use msleep() as delay during ISP polling.

Mailbox commands are polled for completion during ISP
initialization.  During potentially 'long' mailbox commands
(i.e. fabric login), we really don't want a busy-wait delay
to potentially trigger a (benign) soft-lockup BUG().
Signed-off-by: NAndrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/qla2xxx/qla_mbx.c

@@ -196,7 +196,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *ha, mbx_cmd_t *mcp)
 			/* Check for pending interrupts. */
 			qla2x00_poll(ha);
 
-			udelay(10); /* v4.27 */
+			msleep(10);
 		} /* while */
 	}