input: touchscreen: Remove single touch input params

Remove single touch input params.
Firmare isn't reported pressure, remove pressure params.

Signed-off-by: Zhang Chuming <chuming.zhang@elainc.com.cn>
Git-commit: 0ed6d0dfe23a0281fe3707922882033e523ab525
Git-Repo: https://github.com/ElanDriver/Sparrow/tree/Sparrow_ElanDriver


Change-Id: I9171be65fbf632ba5bffcc9bf087ea81d55354cb
Signed-off-by: Venkataraman Nerellapalli <venkataraman.nerellapalli@codeaurora.org>