perf bpf-filter: Return -ENOMEM directly when pfi allocation fails

Directly return -ENOMEM when pfi allocation fails,
instead of performing other operations on pfi.

Fixes: 0fe2b18 ("perf bpf-filter: Support multiple events properly")
Signed-off-by: Hao Ge <gehao@kylinos.cn>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: hao.ge@linux.dev
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20241113030537.26732-1-hao.ge@linux.dev
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Author: GeHao01994

tools/perf/util/bpf-filter.c

@@ -375,7 +375,7 @@ static int create_idx_hash(struct evsel *evsel, struct perf_bpf_filter_entry *en
 	pfi = zalloc(sizeof(*pfi));
 	if (pfi == NULL) {
 		pr_err("Cannot save pinned filter index\n");
-		goto err;
+		return -ENOMEM;
 	}
 
 	pfi->evsel = evsel;