input: touchscreen: add protocol A support to ITE tech driver

Add multi-touch protocol A support to ITE tech touchscreen
driver.

This is propagation gerrit for 8909w bring up.

Change-Id: I49bc7e3eaa3b266fe92bb209f56ae5a1b40675e0
Signed-off-by: Himanshu Aggarwal <haggarwa@codeaurora.org>
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>