perf symbols: Unexport symbol_type__is_a()

Now this is only used in the symbols.c file, where it will finally
disappear when we remove the MAP_{FUNCTION,VARIABLE} split.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-a9t4d4hfrycczq9vpsk5sr8q@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/symbol.c

@@ -70,7 +70,7 @@ static enum dso_binary_type binary_type_symtab[] = {
 
 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
 
-bool symbol_type__is_a(char symbol_type, enum map_type map_type)
+static bool symbol_type__is_a(char symbol_type, enum map_type map_type)
 {
 	symbol_type = toupper(symbol_type);
 

tools/perf/util/symbol.h

@@ -300,7 +300,6 @@ size_t __symbol__fprintf_symname(const struct symbol *sym,
 				 bool unknown_as_addr, FILE *fp);
 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
-bool symbol_type__is_a(char symbol_type, enum map_type map_type);
 bool symbol__restricted_filename(const char *filename,
 				 const char *restricted_filename);
 int symbol__config_symfs(const struct option *opt __maybe_unused,