bpf: Remove the preceding __ from __bpf_selem_unlink_storage

__bpf_selem_unlink_storage is taking the spin lock and there is
no name collision also. Having the preceding '__' is confusing
when reviewing the later patch.
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20230308065936.1550103-5-martin.lau@linux.devSigned-off-by: Alexei Starovoitov <ast@kernel.org>

kernel/bpf/bpf_local_storage.c

@@ -216,8 +216,8 @@ static bool bpf_selem_unlink_storage_nolock(struct bpf_local_storage *local_stor
 	return free_local_storage;
 }
 
-static void __bpf_selem_unlink_storage(struct bpf_local_storage_elem *selem,
-				       bool use_trace_rcu)
+static void bpf_selem_unlink_storage(struct bpf_local_storage_elem *selem,
+				     bool use_trace_rcu)
 {
 	struct bpf_local_storage *local_storage;
 	bool free_local_storage = false;
@@ -288,7 +288,7 @@ void bpf_selem_unlink(struct bpf_local_storage_elem *selem, bool use_trace_rcu)
 	 * the local_storage.
 	 */
 	bpf_selem_unlink_map(selem);
-	__bpf_selem_unlink_storage(selem, use_trace_rcu);
+	bpf_selem_unlink_storage(selem, use_trace_rcu);
 }
 
 /* If cacheit_lockit is false, this lookup function is lockless */