perf evsel: Rename perf_evsel__env() to evsel__env()

As it is a 'struct evsel' method, not part of tools/lib/perf/, aka
libperf, to whom the perf_ prefix belongs.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-trace.c

@@ -2382,7 +2382,7 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
 
 static const char *errno_to_name(struct evsel *evsel, int err)
 {
-	struct perf_env *env = perf_evsel__env(evsel);
+	struct perf_env *env = evsel__env(evsel);
 	const char *arch_name = perf_env__arch(env);
 
 	return arch_syscalls__strerrno(arch_name, err);

tools/perf/util/annotate.c

@@ -2156,7 +2156,7 @@ int symbol__annotate(struct map_symbol *ms, struct evsel *evsel,
 		.evsel		= evsel,
 		.options	= options,
 	};
-	struct perf_env *env = perf_evsel__env(evsel);
+	struct perf_env *env = evsel__env(evsel);
 	const char *arch_name = perf_env__arch(env);
 	struct arch *arch;
 	int err;

tools/perf/util/evsel.c

@@ -2563,7 +2563,7 @@ int evsel__open_strerror(struct evsel *evsel, struct target *target,
 			 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
 }
 
-struct perf_env *perf_evsel__env(struct evsel *evsel)
+struct perf_env *evsel__env(struct evsel *evsel)
 {
 	if (evsel && evsel->evlist)
 		return evsel->evlist->env;

tools/perf/util/evsel.h

@@ -401,7 +401,7 @@ static inline bool evsel__has_br_stack(const struct evsel *evsel)
 	       evsel->synth_sample_type & PERF_SAMPLE_BRANCH_STACK;
 }
 
-struct perf_env *perf_evsel__env(struct evsel *evsel);
+struct perf_env *evsel__env(struct evsel *evsel);
 
 int perf_evsel__store_ids(struct evsel *evsel, struct evlist *evlist);
 #endif /* __PERF_EVSEL_H */

tools/perf/util/machine.c

@@ -2619,7 +2619,7 @@ static int thread__resolve_callchain_sample(struct thread *thread,
 		chain_nr = chain->nr;
 
 	if (evsel__has_branch_callstack(evsel)) {
-		struct perf_env *env = perf_evsel__env(evsel);
+		struct perf_env *env = evsel__env(evsel);
 
 		err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
 						   root_al, max_stack,