input: touchscreen: propagate changes from 4.14 to 5.4 for Atmel MXT driver

The change propagates missing changes from msm-4.14 to msm-5.4 for Atmel
MXT driver.

Change-Id: I1b6011e1018d08cb34aad6896a5e7da66254dfed
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>