[Replicant] Cypress touchkey patch serie

[Denis 'GNUtoo' Carikli]

Hi,

Here's the patch serie for the cypress touchkey.

Reviews and tests are welcome.

For testing them, there are several ways to test the patches:
- Using images that I built from [1].
- By using a different manifest and then building the images
  - If you don't have already the replicant 6 source code or if
    you want to download everything again in a different directory
    you could use the following commands:
    $ mkdir cypress-tests
    $ cd cypress-tests
    $ repo init -u https://git.replicant.us/GNUtoo/manifest.git -b cypress/replicant-6.0-dev
    $ repo sync
  - Else if you want to convert an existing Replicant 6 repository,
    you could use the following commands, but they might erase all
    your uncommited work, and might also make you loose track of the local
    commits:
    $ cd <replicant/source/code/directory>
    $ rm -rf .repo/manifests/
    $ repo init -u https://git.replicant.us/GNUtoo/manifest.git -b cypress/replicant-6.0-dev
    $ repo sync --force-sync
  Once the source code has been dowloaded, the regular Replicant 6[2] build instructions
  are expected to work to build the code.
  - Else you could apply the patches to the kernel/samsung/smdk4412/ directory
    inside the replicant-6 source code, with git am. This can for instance be by downloading
    the email of the patches to the filesystem and running the following commands:
    $ cd kernel/samsung/smdk4412/
    $ git am /path/to/saved/email

References:
-----------
[1]https://replicant.cyberdimension.org/cypress-test-0002/
[2]https://redmine.replicant.us/projects/replicant/wiki/#Replicant-build

Denis.