msm: camera: use common entry for OIS config

It is redundant to use multiple functions to process
OIS commands, because all functions are loading registers
and may be replace using a common one.
This change adds a common function for multiple ois configs.

Change-Id: Ic27c9e656802be2143748da69eb47d0220af0d8d
Signed-off-by: Xu Han <hanxu@codeaurora.org>