msm: camera: isp: Change bus irq error mask value

Bus error irq status 2 mask value set to 0xc0 to enable
dual comp overwrite error and dual comp error. IFE Hardware
always gives the dual comp overwrite error on first frame in
the dual ife mode. As per the HPG document dual comp overwrite
need to be masked.

Change-Id: I90ebbb5e9185a264a780810b1250708327717f10
Signed-off-by: Ravikishore Pampana <rpampana@codeaurora.org>