msm: camera: add missing stats skip in isp40 and isp46

When implementing the stats skip update logic, the support
in different vfe version driver is missing.
Add missing stats skip implentation in isp 40 and isp 46.

Change-Id: I881515c3f61dab00fab1701935a1d0a4cf8e7ead
Signed-off-by: Peter Liu <pingchie@codeaurora.org>