msm: camera: Change sensor power up sequence

1) Currently same power up sequence is followed
for all sensors. This request has different power
up sequence for IMX074, OV2720 and MT9M114 sensors
as per vendor recommendation.
2) Remove compile time macro condition in
board file
3) Make sensor config independent of Kconfig

Change-Id: Icbe6da31a8cb510f1d0c73bf29eda74ad74050ac
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>