[PATCH v4 9/9] iio: enable context analysis for all drivers

[Kim Jinseob]

I independently build-tested the full v4 series (1/9 through 9/9) on
top of jic23/iio.git testing at 7d80b4b383bc, using Clang 24.0.0git
with context analysis enabled and W=1.

Results:

  - x86_64 OSF: 5/5 translation units built, 0 warnings/errors.

  - ARM64 OSF: 5/5 translation units built, 0 warnings/errors.

  - x86_64 allmodconfig-based IIO: 723/723 selected translation units
built, 0 warnings/errors.

As a control, enabling context analysis with 9/9 alone reproduced 256
warnings and 2 errors. Applying the complete series eliminated these
diagnostics, including an OSF warning resolved by the conditional mode
claim annotation in 2/9.

Testing covered compilation and static context analysis only. Final
module linking, module loading and runtime/hardware testing were not
performed.

Tested-by: Jinseob Kim kimjinseob88 at gmail.com