perf vendor events intel: Add uncore events for Xeon Phi (Knights Landing)

Add metrics for memory and MCDRAM. Minimal metrics only for now.
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/n/tip-c0cix4eprbldfrx5zf60suvh@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/pmu-events/arch/x86/knightslanding/uncore-memory.json

+[
+    {
+        "BriefDescription": "ddr bandwidth read (CPU traffic only) (MB/sec). ",
+        "Counter": "0,1,2,3",
+        "EventCode": "0x03",
+        "EventName": "UNC_M_CAS_COUNT.RD",
+        "PerPkg": "1",
+        "ScaleUnit": "6.4e-05MiB",
+        "UMask": "0x01",
+        "Unit": "imc"
+    },
+    {
+        "BriefDescription": "ddr bandwidth write (CPU traffic only) (MB/sec). ",
+        "Counter": "0,1,2,3",
+        "EventCode": "0x03",
+        "EventName": "UNC_M_CAS_COUNT.WR",
+        "PerPkg": "1",
+        "ScaleUnit": "6.4e-05MiB",
+        "UMask": "0x02",
+        "Unit": "imc"
+    },
+    {
+        "BriefDescription": "mcdram bandwidth read (CPU traffic only) (MB/sec). ",
+        "Counter": "0,1,2,3",
+        "EventCode": "0x01",
+        "EventName": "UNC_E_RPQ_INSERTS",
+        "PerPkg": "1",
+        "ScaleUnit": "6.4e-05MiB",
+        "UMask": "0x01",
+        "Unit": "edc_eclk"
+    },
+    {
+        "BriefDescription": "mcdram bandwidth write (CPU traffic only) (MB/sec). ",
+        "Counter": "0,1,2,3",
+        "EventCode": "0x02",
+        "EventName": "UNC_E_WPQ_INSERTS",
+        "PerPkg": "1",
+        "ScaleUnit": "6.4e-05MiB",
+        "UMask": "0x01",
+        "Unit": "edc_eclk"
+    }
+]