mc13892 touchscreen support

[Marc Reilly]

Hi,

This patch series adds touchscreen support for the mc13892 to the
mc13873 driver. The driver is renamed to mc13xxx_ts to reflect this.

The first 3 patches apply cleanly to v3.2.

The fourth patch allows setting the ATO and ATOX registers with each
conversion. It requires another series I just posted [1].

Cheers,
Marc

[1] http://lists.arm.linux.org.uk/lurker/message/20120129.223322.722b7424.en.html