bpf: Fix comment error in fixup_kfunc_call function

insn->imm for kfunc is the relative address of __bpf_call_base,
instead of __bpf_base_call, Fix the comment error.
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20221208013724.257848-1-yangjihong1@huawei.comSigned-off-by: Alexei Starovoitov <ast@kernel.org>

kernel/bpf/verifier.c

@@ -15350,7 +15350,7 @@ static int fixup_kfunc_call(struct bpf_verifier_env *env, struct bpf_insn *insn,
 	}
 
 	/* insn->imm has the btf func_id. Replace it with
-	 * an address (relative to __bpf_base_call).
+	 * an address (relative to __bpf_call_base).
 	 */
 	desc = find_kfunc_desc(env->prog, insn->imm, insn->off);
 	if (!desc) {