msm: camera: csiphy: reset phy lane configs on shutdown

Need to reset the phy lane configurations to default value on phy
shutdown. If the old value is retained , phy lane configurations can go
bad in next session.

Change-Id: I506eda4997a2f47b5e4ce733c081cff6ec950d76
Signed-off-by: Tony Lijo Jose <tjose@codeaurora.org>