input/touchscreen: Import himax driver

[ALM:10872955] [FP4]:TP bringup
 &&&%%%comment:[FP4]:TP bringup
 &&&%%%bug number:10872955
 &&&%%%product name:sm7225_r_fp4
 &&&%%%root cause:Coding
 &&&%%%Bug category:T2M
 &&&%%%Module_Impact:kernel
 &&&%%%Test_Suggestion:no
 &&&%%%Solution:TP bringup
 &&&%%%Test_Report:test is ok
 &&&%%%VAL Can Test:yes

Change-Id: I025afea119cf1e080c230b3fe1feb2dfaad40a4c