IIO: 1st set of fixes for the 6.8 cycle

Usual mixed bag of issues introduced this cycle and fixes for long term
issues that have been identified recently + one case where I messed up
a merge resolution and dropped the build file changes.

Most important is the userspace ABI fix for the iio_modifier enum
where we accidentally added new entries in the middle rather than at
the end.

IIO Core
 - Close a memory leak in an error path.
 - Move LIGHT_UVA and LIGHT_UVB definitions to end of the iio_modifier
   enum to avoid breaking older userspace. (not yet in a released kernel
   thankfully).

adi,adis
 - Fix a DMA buffer alignment issue that was missing in series that fixed
   these across IIO.

adi,ad-sigma-delta
 - Fix a DMA buffer alignment issue that was missing in series that fixed
   these across IIO.

adi,ad4130
 - Zero init remaining fields of clock init data.
 - Only set GPIO control bits on pins that aren't in use for anything else.

adi,ad5933
 - Fix an old bug due to type mismatch. This is a rare device so good to
   get some new test coverage.

adi,ad7091r
 - Use right variable for an error return code.

bosch,bma400
 - Add missing CONFIG_REGMAP_I2C dependency.

bosch,bmp280:
 - Add missing bmp085 ID to the SPI table to avoid mismatch with the
   of_device_id table.

hid-sensors:
 - Avoid returning an error for timestamp read back that succeeds.

pni,rm3100
 - Check value read from RM31000_REG_TMRC register is valid before using
   it. Hardening  to avoid a real world issue seen on some faulty hardware.

st,st-sensors
 - Fix a DMA buffer alignment issue that was missing in series that fixed
   these across IIO.

ti,hdc3020
 - Add missing Kconfig and Makefile entrees accidentally dropped when patches
   were applied.
 - Fix wrong temperature offset (negated)
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