input: atmel_mxt_ts: no config update for major mismatch

This change is needed in order to ensure that force config update
logic is controlled by a flag in DT/Board file/Sysfs. If config update
need to be done, then major number on device must match.
If force config update is chosen, then we override the major
version too.

Change-Id: Id1cd0cb333e1090e4d838604ee1895d54b02ce0b
Signed-off-by: Sreenivasulu Chalam Charla <sreeniva@codeaurora.org>