Second round of new IIO drivers and cleanups for the 3.8 cycle.
Usual mixed bag of cleanups and minor improvements including
one reversion for a patch in the previous series.
* adt7310 and adt7410 drivers merged into one.
* Revert use devm_kcalloc in at91_adc (because it doesn't exist)
* unlocking fix for error path in the ad5449
* isl29018 suspend and resume support.
* improved pseudo floating point parsing for info_mask write
attributes (and hence into write_raw). Reject some messed up
strings.