perf util: Make header guard consistent with tool

Remove git reference by changing GIT_COMPAT_UTIL_H to __PERF_UTIL_H.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
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: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20221130062935.2219247-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/util.h

 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef GIT_COMPAT_UTIL_H
-#define GIT_COMPAT_UTIL_H
+#ifndef __PERF_UTIL_H
+#define __PERF_UTIL_H
 
 #define _BSD_SOURCE 1
 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
@@ -94,4 +94,4 @@ int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x,
 		0;						\
 	})
 
-#endif /* GIT_COMPAT_UTIL_H */
+#endif /* __PERF_UTIL_H */