media: qcom: camss: Add VFE680 support

Add silicon enabling support for VFE680 as found on sm8450, x1e and
derivatives thereof.

References work from Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
[bod: fix minor checkpatch linelenght splat @ lines 21, 22]
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>