bpf: allow bpf helpers to be used into HID-BPF struct_ops

Without this helpers like bpf_printk() or bpf_map_update() are not
available, making anything but change of bytes impossible to do.

Link: https://lore.kernel.org/r/20240608-hid_bpf_struct_ops-v3-14-6ac6ade58329@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>

drivers/hid/bpf/hid_bpf_struct_ops.c

@@ -89,6 +89,7 @@ static int hid_bpf_ops_btf_struct_access(struct bpf_verifier_log *log,
 }
 
 static const struct bpf_verifier_ops hid_bpf_verifier_ops = {
+	.get_func_proto = bpf_base_func_proto,
 	.is_valid_access = hid_bpf_ops_is_valid_access,
 	.btf_struct_access = hid_bpf_ops_btf_struct_access,
 };