input: touchscreen: bu21150: add new ioctl commands

- Modified file header.
- Added get_frame timeout detection and IOCTL to start/stop timeout detection.
- Added IOCTL to notify SCAN_MODE - Modified to clear the frame data acquisition flag during the execution of the reset IOCTL.
- Modified to discard the acquired data if a reset has been performed during SPI read.
- Added IOCTL definitions. - Modified wornings for kernel checkpatch.

Change-Id: I4de7a2fe4e3761375917ab8dd2ef655234e3c4b5
Signed-off-by: Hirofumi Nakagawa <hirofumi.nakagawa.fk@j-display.com>
Git-commit: 5431b50d94963ec7bc728950c6d07132e9df3974
Git-repo: https://github.com/JapanDisplayInc/bu21150-driver


[jinglin@codeaurora.org: resolve minor merge conflicts, add commit subject,
move original Signed-off-by line down]
Signed-off-by: Jing Lin <jinglin@codeaurora.org>