input: touchscreen: synaptics v1.1

- Add fwu_go_nogo function in synaptics_fw_update.c
- Add BTN_TOUCH support in synaptics_i2c_rmi4.c
- Add List check in synaptics_i2c_rmi4.c

Change-Id: I8cb776d5b3d20bdee5036cfe0dbcb9bbaa8bf6bd
[amaloche@codeaurora.org: Subject modified from "v1.1"
 - Removed reg_access & fw_updater files due to improper license
 - Modified commit text to reflect file changes]
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
3 files changed