'regval_list' is unused since the original
commit 859891228e56 ("media: i2c: dw9768: Add DW9768 VCM driver")
Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>