ov8830: enlarge maximum resolution by using dummy pixels

ov8830: enlarge maximum resolution by using dummy pixels

BZ: 26638

The nominal 8 Mpix resolution for ov8830 is 3264x2448. However,
the ISP is cropping some pixels away from this which makes
the maximum resolution visible to application less than the
nominal resolution. This patch increases the maximum resolution
mode for ov8830 by 16 pixels by including dummy pixels around
the active image area so that the nominal resolution is maintained
after ISP cropping.

Change-Id: I9ff9d75ebb31f972512463ca69e725ea3a9d9a4e
Signed-off-by: Tuukka Toivonen <tuukka.toivonen@intel.com>
Reviewed-on: http://android.intel.com:8080/37838
Reviewed-by: Monroy, German <german.monroy@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>