media: staging: starfive: camss: fix off by one in isp_enum_mbus_code()

These > comparisons should be >=.  The formats->fmts[] array is either
a pointer to isp_formats_sink[] or isp_formats_source[] respectively.

Fixes: e5785462 ("media: staging: media: starfive: camss: Add ISP driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>