perf kvm powerpc: Add missing rename opf pmu_have_event() to perf_pmus__have_event()

Missed function rename from pmu_have_event to perf_pmus__have_event made
the perf build fail on powerpc.

Committer notes:

The perf_pmus__have_event() is declared in util/pmus.h, so use it
instead of by now needless util/pmu.h.

Fixes: 1eaf496ed3 ("perf pmu: Separate pmu and pmus")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230530021433.3107580-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/powerpc/util/kvm-stat.c

@@ -5,7 +5,7 @@
 #include "util/debug.h"
 #include "util/evsel.h"
 #include "util/evlist.h"
-#include "util/pmu.h"
+#include "util/pmus.h"
 
 #include "book3s_hv_exits.h"
 #include "book3s_hcalls.h"
@@ -204,7 +204,7 @@ int kvm_add_default_arch_event(int *argc, const char **argv)
 
 	parse_options(j, tmp, event_options, NULL, PARSE_OPT_KEEP_UNKNOWN);
 	if (!event) {
-		if (pmu_have_event("trace_imc", "trace_cycles")) {
+		if (perf_pmus__have_event("trace_imc", "trace_cycles")) {
 			argv[j++] = strdup("-e");
 			argv[j++] = strdup("trace_imc/trace_cycles/");
 			*argc += 2;