Input: xpad - simplify error condition in init_output

[ Upstream commit a8c34e27fb1ece928ec728bfe596aa6ca0b1928a ]

Replace first goto with simple returns as we really are just returning
one error code.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>