input: touchscreen: Add himax touchscreen support

apq8053-lite FEP-V2 SOM has 2 variants of display Panel -
8" and 10". For 8" display panel the touch vendor is Himax.
Add Himax touchscreen support for 8" Display Panel.

Change-Id: Icfbf21f800b09d83122795fc26f833d5c3bd6bcb
Signed-off-by: Paul Chang <poyuan_chang@himax.com.tw>
Git-commit: aa2965fae3f8d791d0fd4c8105408bee807b540c
Git-commit: 714259e2f1eadeb712fdb9cf6e6619fe6eece156
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Git-commit: 887a29104e1d895664642a27db7935c2bbc32d0f
Git-commit: 0caefe38fb476103606494e13f830f2690acf430
Git-commit: f855d7e895df3d307ceee5cef69d410e816a4987
Git-Repo:  https://github.com/HimaxSoftware/msm-3.18


Signed-off-by: Vijay Navnath Kamble <vkambl@codeaurora.org>