input: synaptics: Support lockdown in firmware update

2013.07.29
- Support lockdown in firmware update
- Support write config area from a pure config file
- Skip entering bootloadermode when reading config area
- Use list_for_each_entry_safe if list item will be changed

Signed-off-by: Alexandra Chin <alexandra.chin@tw.synaptics.com>
Change-Id: I2d4fb52456088a1f769a7de4fcac6c3e4589a5a5
Git-commit: a1028858bd164b43e5a78fd2d55f153b84529591
Git-repo: git://github.com/synaptics-touch/msm-3.4.git


[amaloche@codeaurora.org: Changes due to base driver
differences]
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>