input: atmel_mxt_ts: Add firmware upgrade support for MXT224E

Add firmware upgrade support for MXT224E and also support
the new T55 object introduced with the newer firmware. Read
T38 object from touch controller after the firmware upgrade
to avoid reading/writing into old T38 address.

Change-Id: Ifc7e0b2c31badbbf5a402413e841606db4f6dc66
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>