[SCSI] mvsas: Add new macros and functions

Add new macros: MVS_SOFT_RESET, MVS_HARD_RESET, MVS_PHY_TUNE,
	MVS_COMMAND_ACTIVE, EXP_BRCT_CHG, MVS_MAX_SG
Add new member sg_width in struct mvs_chip_info
Use macros rather than magic number
Add new functions: mvs_fill_ssp_resp_iu, mvs_set_sense,
	mvs_94xx_clear_srs_irq, mvs_94xx_phy_set_link_rate

Signed-off-by: Xiangliang Yu <yuxiangl@marvell.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h
index e39629d..1927e1b 100644
--- a/drivers/scsi/mvsas/mv_defs.h
+++ b/drivers/scsi/mvsas/mv_defs.h
@@ -395,9 +395,10 @@
 };
 
 enum mvs_event_flags {
-	PHY_PLUG_EVENT	= (3U),
+	PHY_PLUG_EVENT		= (3U),
 	PHY_PLUG_IN		= (1U << 0),	/* phy plug in */
 	PHY_PLUG_OUT		= (1U << 1),	/* phy plug out */
+	EXP_BRCT_CHG		= (1U << 2),	/* broadcast change */
 };
 
 enum mvs_port_type {