perf vendor events intel: Update cascadelakex metric units

The updated metrics were published in:
intel/perfmon@2dce436

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Author: captain5050

tools/perf/pmu-events/arch/x86/cascadelakex/uncore-cache.json

@@ -22,7 +22,7 @@
         "Unit": "CHA"
     },
     {
-        "BriefDescription": "LLC misses - Uncacheable reads (from cpu) . Derived from unc_cha_tor_inserts.ia_miss",
+        "BriefDescription": "LLC misses - Uncacheable reads (from cpu). Derived from unc_cha_tor_inserts.ia_miss",
         "Counter": "0,1,2,3",
         "EventCode": "0x35",
         "EventName": "LLC_MISSES.UNCACHEABLE",

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

@@ -316,32 +316,32 @@
         "Unit": "iMC"
     },
     {
-        "BriefDescription": "Intel Optane DC persistent memory bandwidth read (MB/sec). Derived from unc_m_pmm_rpq_inserts",
+        "BriefDescription": "Intel Optane DC persistent memory bandwidth read (MiB/sec). Derived from unc_m_pmm_rpq_inserts",
         "Counter": "0,1,2,3",
         "EventCode": "0xE3",
         "EventName": "UNC_M_PMM_BANDWIDTH.READ",
         "PerPkg": "1",
-        "ScaleUnit": "6.103515625E-5MB/sec",
+        "ScaleUnit": "6.103515625E-5MiB/sec",
         "Unit": "iMC"
     },
     {
-        "BriefDescription": "Intel Optane DC persistent memory bandwidth total (MB/sec). Derived from unc_m_pmm_rpq_inserts",
+        "BriefDescription": "Intel Optane DC persistent memory bandwidth total (MiB/sec). Derived from unc_m_pmm_rpq_inserts",
         "Counter": "0,1,2,3",
         "EventCode": "0xE3",
         "EventName": "UNC_M_PMM_BANDWIDTH.TOTAL",
         "MetricExpr": "UNC_M_PMM_RPQ_INSERTS + UNC_M_PMM_WPQ_INSERTS",
         "MetricName": "UNC_M_PMM_BANDWIDTH.TOTAL",
         "PerPkg": "1",
-        "ScaleUnit": "6.103515625E-5MB/sec",
+        "ScaleUnit": "6.103515625E-5MiB/sec",
         "Unit": "iMC"
     },
     {
-        "BriefDescription": "Intel Optane DC persistent memory bandwidth write (MB/sec). Derived from unc_m_pmm_wpq_inserts",
+        "BriefDescription": "Intel Optane DC persistent memory bandwidth write (MiB/sec). Derived from unc_m_pmm_wpq_inserts",
         "Counter": "0,1,2,3",
         "EventCode": "0xE7",
         "EventName": "UNC_M_PMM_BANDWIDTH.WRITE",
         "PerPkg": "1",
-        "ScaleUnit": "6.103515625E-5MB/sec",
+        "ScaleUnit": "6.103515625E-5MiB/sec",
         "Unit": "iMC"
     },
     {