It is spurious to call 'clk_disable_unprepare()' when
'clk_prepare_enable()' has not been called yet.
Re-order the error handling path to avoid it.

Fixes: a4260ea4 ("media: sun4i: Add H3 deinterlace driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: err_exlusive_rate -> err_exclusive_rate]
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>