perf vendor events arm64: Fix Hisi hip08 DDRC PMU eventname

The "EventName" for the DDRC precharge command event is incorrect, so
fix it.

Fixes: 57cc7324 ("perf jevents: Add support for Hisi hip08 DDRC PMU aliasing")
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linuxarm@huawei.com
Link: http://lore.kernel.org/lkml/1567612484-195727-2-git-send-email-john.garry@huawei.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/pmu-events/arch/arm64/hisilicon/hip08/uncore-ddrc.json

@@ -15,7 +15,7 @@
    },
    {
 	    "EventCode": "0x04",
-	    "EventName": "uncore_hisi_ddrc.flux_wr",
+	    "EventName": "uncore_hisi_ddrc.pre_cmd",
 	    "BriefDescription": "DDRC precharge commands",
 	    "PublicDescription": "DDRC precharge commands",
 	    "Unit": "hisi_sccl,ddrc",