msm: camera: add support for runtime AXI configuration update

This change add support to change the ISP writemaster configuration
when the write masters are active. This allows ISP to change the
output dimension on the fly without reconfiging the whole ISP
pipeline. The change will first pause the writemaster at frame
boundary and after the writemasters are stopped, the writemasters
configurations will be update and resume the wrtiemasters.

Change-Id: Icbde7131627ab42a2213e7ca63da632b30417ee2
Signed-off-by: Kevin Chan <ktchan@codeaurora.org>