mt9e013: implement VIDIOC_G_PARM for getting stream parameters

mt9e013: implement VIDIOC_G_PARM for getting stream parameters

BZ: 41720

Implement function to return struct v4l2_streamparm and call this
function from VIDIOC_S_PARM handler to fill the returned
structure. Also clear sensor mode parameters when streaming mode
is set. The sensor mode should be selected after the streaming mode
has been set.

Change-Id: I040510ce6b767695a1425e76388da4f57c8801d3
Signed-off-by: Tuukka Toivonen <tuukka.toivonen@intel.com>
Reviewed-on: http://android.intel.com:8080/52728
Reviewed-by: Niemimuukko, Ukri <ukri.niemimuukko@intel.com>
Reviewed-by: Laakso, Antti <antti.laakso@intel.com>
Reviewed-by: Kontola, Kalervo <kalervo.kontola@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>