Second set of IIO fixes for the 4.13 cycle.

Given the late stage of this series, some more involved fixes have been
held back for the upcoming merge window.

The hid-sensor issue has been causing problems for a long time so it
is great to have that one finally fixed!  No more bug reports for the
userspace guys (well about that anyway).

* documentation
  - some warning fixes due to missing colons in kernel-doc.
* adis16480
  - fix accel scale factor.
* bmp280
  - properly initialize the device for humidity readings - without this
  the humidity readings may be skipped and a magic value of 0x8000 returned.
* hid-sensor-strigger
  - fix a race with user space when powering up the sensor.
* ina291
  - Avoid an underflow for the sleeping time as a result of supporting the
  fastest rates.
* st-magnetometer
  - Fix the status register address for hte LSM303AGR,
  - Remove the ihl property for LSM303AGR as the sensor doesn't support
  active low for the dataready line.
* stm32-adc
  - Fix use of a common clock rate.
* stm32-timer
  - fix the quadrature mode get routine to account for the magic 0 value.
  set on boot.
  - fix the return value of write_raw,
  - fix the get/set down count direction as the enum value was not being
  converted to the relevant bit field,
  - add an enable attribute to actually turn it on when in encoder mode,
  - missing mask when reading the trigger mode.
-----BEGIN PGP SIGNATURE-----

iQJFBAABCAAvFiEEbilms4eEBlKRJoGxVIU0mcT0FogFAlmZnXoRHGppYzIzQGtl
cm5lbC5vcmcACgkQVIU0mcT0Foj5nA/+J/CB6E6lOiWXplGVgDJWNOgTAE5zS27Z
mwbUpI6kgGOS42+BJTtfQM9JvdZ8nLl4cR7oJ4v2LWXUV0p5WhKVx3EvKFcMazKj
FZvEZLx0fBvCg7N7u5+v3dWEHuh3DkLBl36J13oxDM0v0oxHVbg+RFfous9t1kCK
faV+nQeGBy51TBw7qasAaKV3FGqFmftRhYzNoG40yH0gzcu/YWRL47rotwwQryMj
XLJg9AZ4w2XQmUgNXGjdTtphDT99sRWxi6zQCtlGQitm2E+4Oc2l7xg4tDpudqzY
oPo64BVF2UcZO7KL0KBAhvhmxFOXtmayPDLknfqzScLEYGV7AZUkwMiNBY2x3H+d
pkyLx1wKZd2HX2yNDM9K9We1vuAt/845Unx8iX2cUMzx89n99ODlGvE0R/7IpnJd
YezXwoDqwUZYzysyZb6weFXdhNCSyYRFnGXw9axvA/3c2vgxVBZd4Q9BnAZ0J2xy
gtbrosvMD6U713N+CA6V8ccz46UNHr4pZK65qiUfCMam+zs1JUkmrUJtnuPwPfJA
A1SK55VzrWqq1LVA6qBvbRpx19Ylh1oFJtwsFCPIE85kZCpmop/LOPia4PXeXePr
HOrNJNT+c6bv6aHyEL8CePqyWcoLL+TLoDET6XzEN0/eQI327jtW1EjTX/Utbw1J
8iyLXx7CgDo=
=1ota
-----END PGP SIGNATURE-----