colibri-pxa3xx patches

This patch series adds a bit more colibri pxa300/310 support

1/5: cpufreq-pxa3xx: use HSIO 312MHz on the pxa310
This one more or less depends on Marek Vasut's HSIO bus x24 multiplier patch which defines 312MHz as valid HSIO frequency.
(without this x24 multiplier, pxafb will make wrong pixelclock calculations)

2/5: colibri-pxa300: fix ac97 init on pxa310

3/5: colibri-pxa300: add uart support

4/5: colibri-pxa3xx: add i2c support

5/5: colibri-pxa3xx: add touchscreen support

Rgds, Pieter