msm: camera: vfe: Update register programming

VFE Bus 2.0 client configuration register requires setting
the sixteenth bit instead of the first bit as earlier. Bus
2.0 cgc override register now holds more bits to account
for the increased number of clients. VFE core must be
programmed to at least the reset value always. The
corresponding source code updates are added in this change.

Change-Id: I1da1120b5c5a3dda7f7122eacac9e68bfede88e4
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>