IIO: 1st set of new device support, features and cleanup for 6.9

IIO Backend support
===================

New approach from Nuno Sa to the problem of reuse of drivers with
IIO devices that are actually the combination of a highspeed chip
and an FPGA core handling the data capture and flows. It will hopefully
also apply to some other split designs. The ad9467 and axi-adi drivers
are converted over to this framework.

New device support
==================

adi,admfm2000
- New driver for this dual microwave down converter.
ams,as73211
- Add support for as7331 UV sensor.
richtek,rtq6056
- Add support for related parts RTQ6053 and RTQ6059
st,lsm6dsx
- Add ASM330LHHXG1 accelerometer and gyro support (mainly IDs)
ti,ads1298
- New driver for this medical ADC.

Features
========

tests
- Unit tests for the gain-time-scale helper library.
bosch,bmi088
- I2C support.
bosh,bmi160
- Add 10EC5280 ACPI ID. Used in a number of devices that won't get fixed.
  The ID is actually a PCI ID belonging to realtech. No response was received
  to earlier attempts to notify them of this.
  The manufacturers of some devices have replied to say they will not fix
  this incorrect ID. Add the ID and hope it isn't a problem.
bosch,bmi323
- Add BOSC0200 ACPI ID. Note this is a duplicate of one in the bmc150
  driver (it appears these parts share a windows driver).
  Both drivers perform an ID check that is safe on the other part before
  successfully probing.
hid-sensors-als
- Add color temperature and chromaticity support. Note this is a replacement
  for the series reverted in 6.8 that correctly handles all the potential
  channel combinations.
honeywell,hsc030pa
- Triggered buffer support (after driver cleanup).
honeywell,mprls00025pa
- Improved error handling.
- New DT binding to allow use of part number triplet as provided in data sheet
  to specify equivalent of most of the binding more efficiently.
- SPI support.
memsic,mxc4005
- ACPI ID MDA6655 as seen in the Chuwi Minibook X 2023
ti,hdc3020
- Add threshold event support (after some driver cleanup)
veml,vcnl4000
- Switch to high resolution proximity measurement.

Cleanup
=======
Various minor typo fixes and better use of defines etc.

Treewide
- Stop using ACPI_PTR(). The savings in space are small and not worth
  the complexity of __maybe_unused of ifdef guards.  To avoid use in
  new IIO drivers based on copy and paste, clean it out.
- cleanup.h based handling of iio_device_claim_direct_mode()/
  iio_device_release_direct_mode() using scope_cond_guard().
  In many drivers this is combined with other automated cleanup
  to give maximum simplifications.
  An initial set of drivers are converted over to this infrastructure.

Tools
- Use rewinddir() instead of seekdir() to return to start of file.

core
- Make iio_bus_type constant.

adi,ad16475
- Use irq_get_trigger_type() instead of opencoding.
adi,ad16480
- Use irq_get_trigger_type() instead of opencoding.
adi,ad-sigma-delta
- Avoid overwriting IRQ flags if provided by firmware.
ams,as73211
- Use IIO_VAL_FRACTIONAL for scales to simplify the code and potentially
  improve accuracy.
gts-library
- Use a div64_u64() instead of a loop to do a division.
honeywell,mprls00025pa
- Clean up dt-binding doc.
- Drop defaults when DT binding not providing values. Very unlikely
  these were useful given they were wrong for vast majority of supported
  devices.
- Whitespace cleanup
miramems,da280
- Use i2c_get_match_data() to replace hand rolled ACPI matching code.
semtech,sx9324
- Avoid unnecessary copying of property strings.
st,lsm6dsx
- Improve docs, particularly wrt to making addition of new device
  support less noisy.
st,lsm9ds0
- Use dev_err_probe() in all probe() error handling.
- Improved header includes.
- Tidy up termination of ID tables.
ti,ads1014
- Correct upper bound on PGA (wrong value had no actual impact)
ti,afe4403/4404
- devm_ useage to simplify error handling in probe() and allow() remove to
  be dropped.
voltage-divider
- Add dt-binding for io-channel-cells to allow such a device to be both
  an IIO consumer and IIO producer at the same time.
-----BEGIN PGP SIGNATURE-----
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=xkgf
-----END PGP SIGNATURE-----