[SCSI] mpt2sas: Added sysfs counter for ioc reset

Added a new sysfs shost attribute called ioc_reset_count. This will
keep count of host resets (both diagnostic and message unit).

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index 6032cbf..a4a7315 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -615,6 +615,7 @@
 	u16		msix_vector_count;
 	u32		*msix_table;
 	u32		*msix_table_backup;
+	u32		ioc_reset_count;
 
 	/* internal commands, callback index */
 	u8		scsi_io_cb_idx;