input: atmel_maxtouch: Rename mxt_platform_data to maxtouch_platform_data

Opensource driver atmel_mxt_ts has the platform data
structure name as atmel_maxtouch. Avoid name conflict
by renaming atmel_maxtouch driver's platform data to
maxtouch_platform_data.

Change-Id: I4bf3ed83e3eab55c4464de365c6009965da73744
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>
(cherry picked from commit 4e9a94e60d589581799ac7c3341ec4dfac8793a5)

Conflicts:

	arch/arm/mach-msm/board-msm7x27a.c