The current implementation prevents us to add variable-length ioctl.
Use a bunch of gotos instead of break to allow us to do so.

No functional changes.
Signed-off-by: NBenjamin Tisssoires <benjamin.tissoires@redhat.com>
Reviewed-by: NDavid Herrmann <dh.herrmann@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>