input: atmel_mxt_ts: Add support for new object

Atmel vendor may release firmware with new objects. New firmware requires
a matched number of objects and object lengths from device tree. Adding in
new objects and object length check to make sure platform data will always
match firmware information.

Change-Id: I96cfdf7d5c459a75410c6f2882370539aa86ee0e
Signed-off-by: Chun Zhang <chunz@codeaurora.org>