EDAC: Add DDR4 flag

BugLink: http://bugs.launchpad.net/bugs/1519631

Make EDAC aware of DDR4/RDDR4 mem types.
Signed-off-by: Jim Snow <jim.m.snow@intel.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: lukasz.anaczkowski@intel.com
Link: http://lkml.kernel.org/r/1449136134-23706-2-git-send-email-hubert.chrzaniuk@intel.com
[ Rebase to 4.4-rc3. ]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>

(cherry picked from commit 255379ae)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

include/linux/edac.h

@@ -237,8 +237,10 @@ enum mem_type {
 #define MEM_FLAG_FB_DDR2        BIT(MEM_FB_DDR2)
 #define MEM_FLAG_RDDR2          BIT(MEM_RDDR2)
 #define MEM_FLAG_XDR            BIT(MEM_XDR)
-#define MEM_FLAG_DDR3		 BIT(MEM_DDR3)
-#define MEM_FLAG_RDDR3		 BIT(MEM_RDDR3)
+#define MEM_FLAG_DDR3           BIT(MEM_DDR3)
+#define MEM_FLAG_RDDR3          BIT(MEM_RDDR3)
+#define MEM_FLAG_DDR4           BIT(MEM_DDR4)
+#define MEM_FLAG_RDDR4          BIT(MEM_RDDR4)
 
 /**
  * enum edac-type - Error Detection and Correction capabilities and mode