atomisp: clear struct v4l2_streamparm which is passed to sensor driver

atomisp: clear struct v4l2_streamparm which is passed to sensor driver

BZ: 41720

AtomISP driver calls s_parm function of sensor drivers and gives
as an argument struct v4l2_streamparm without clearing it. This
causes random parameters to be passed on to drivers causing
possibly random effects.

Change-Id: Id04321ccbebf2ccaa30cdc5debfa1d3396330369
Signed-off-by: Tuukka Toivonen <tuukka.toivonen@intel.com>
Reviewed-on: http://android.intel.com:8080/52727
Reviewed-by: Niemimuukko, Ukri <ukri.niemimuukko@intel.com>
Reviewed-by: Laakso, Antti <antti.laakso@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>