media: ov08x40: Improve ov08x40_identify_module() error logging

ov08x40_identify_module() already logs an error if the read ID mismatches,
so having its caller also log an error results in 2 errors in this case.

Add error logging to the ID register read in ov08x40_identify_module() and
drop the error logging in the caller.

Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>