Values from 0 ~ 100 control amount of filtering on roll and pitch input.
100 = no filter so crisp feel, 0 = a lot of filtering so very sluggish
response

including raw temperature and pressure values

The real purpose of this small change is to kick off the autobuilder for
the AC3.1.1 release.

the ioctl now gets called in a IO timer callback

useful for updating AP_Notify LEDs