media: coda: jpeg: drop coda9_jpeg_dec_huff_setup() return value

coda9_jpeg_dec_huff_setup() never returns anything but 0. Drop
return value and superfluous error handling at the call site.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>