CHROMIUM: Input: atmel_mxt_ts - parse vector field of data packets

CHROMIUM: Input: atmel_mxt_ts - parse vector field of data packets

The atmel_mxt_ts T9 data contains information orientation in its 'vector'
field. Parse and debug print its contents, although its value isn't
actually used yet.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
BUG=chromium-os:27713
TEST=builds clean; vector values are reported when DEBUG is defined.

Change-Id: Ida4d9aa167e5134c76d044599240a6c7e329a62c
Reviewed-on: https://gerrit.chromium.org/gerrit/17951
Commit-Ready: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: Daniel Kurtz <djkurtz@chromium.org>