1st set of IIO new device support, features and cleanups for the 6.3 cycle

The usual mixed bag. So far this has been a quiet cycle for IIO.

New device support
* adi,ad8686
  - Add support for the AD5337 DAC - ID and 8 bit channel support.
* maxim,max5522
  - New driver for this 2 channel DAC.
* nxp,imx93-adc
  - New driver for this SoC ADC which is a fresh IP that will probably
    turn up in additional SoCs going forwards.
* st,magn
  - Add support for magnetometer part of LSM303C which is very similar
    to standalone LIS3MDL already supported.
* ti,ads7924
  - New driver for this 4 channel, 12-bit I2C ADC.
* ti,lmp92064
  - New driver for this 12 bit SPI ADC.
* ti,tmag5273
  - New driver for this 3D Hall-Effect Sensor.

Features
* core
  - Add a standard structure for the value pairs in IIO_VAL_INT_PLUS_MICRO
    available attributes and similar.
* cirrus,ep93xx
  - Add DT binding docs and convert driver to DT based probing.
  - Enable testing building with CONFIG_COMPILE_TEST.
* st,stm32-dfsdm
  - Enable ID register support for discovery of hardware capabilities on
    some devices.

Cleanups and minor fixes
* core
  - Drop the custom iio_sysfs_match_string_with_gaps().
    The special ability of this function to skip gaps in an array
    was never used by any upstream driver.
  - Sort headers whilst touching this file.
* tools
  - Fix memory leak in iio_utils.c
* various
  - leftover i2c probe_new() conversions.
  - scnprintf() -> sysfs_emit() cleanups.
  - hand rolled devm enables -> devm_regulator[_bulk]_get_enable()
  - typo fixes
  - dt-binding cleanup (whitespace, excess quotes and similar)
* adi,ad7746
  - Set variable without pointless conditional.
* fsl,mma9551
  - Squash false positives about use of uninitialized variable where
    garbage undergoes an endian conversion before being ignored.
* measspec,ms5611
  - Switch to fully devm_ managed probe() and so drop explicit remove()
* qcom,spmi-adc
  - Use dev_err_probe() to suppress deferred print.
* qcom,spmi-adc5
  - Define a missing channel used for battery identification.
* qcom,spmi-iadc
  - Document a compatible seen in wild.
* semtech,sx9360
  - Fix units on semtech,resolution dt-binding.
* sensiron,scd30
  - dev_err_probe() usage to simplify error paths a little.
* st,lsm6dsx
  - Add missing mount matrix for the gyro IIO device.
* taos,tsl2563
  - Respect firmware configured interrupt polarity if present.
  - Use i2c_smbus_write_word_data() in a few cases not previously covered.
  - Factor out duplicated interrupt configuration.
  - Switch to GENMASK() / BIT() from hand coded equivalents.
  - Tidy up unused definitions.
  - Use dev_err_probe() as appropriate.
  - Drop platform_data as no in kernel users and there are better ways to
    do equivalent if any are added.
  - Add local struct device variable to tidy up code.
  - Avoid dance via i2c_client to get the drvdata.
  - Tidy up headers ordering and Makefile ordering.
* ti,adc128s052
  - Use new spi_get_device_match_data().
  - Drop ACPI_PTR() protection.
  - Sort headers whilst here.
  - Use asm instead of incorrect include of asm-generic/unaligned.h
* vishay,vcn4000
  - Interrupt support for vcnl4040 (lots of refactoring needed)
* xilinx,ams
  - Use fwnode_device_is_compatible() instead of open coding it.
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