dt: dt-extract-compatibles: Add flag for driver matching compatibles

dt: dt-extract-compatibles: Add flag for driver matching compatibles

Add a new flag, '--driver-match', to the dt-extract-compatibles script
that causes it to only print out compatibles that are expected to match
a driver. This output can then be used by tests to detect device probe
failures.

In order to filter the compatibles down to only ones that will match to
a driver, the following is considered:
- A compatible needs to show up in a driver's of_match_table for it to
  be matched to a driver
- Compatibles that are used in both of_match_table and OF_DECLARE type
  macros can't be expected to match to a driver and so are ignored.
  One exception is CLK_OF_DECLARE_DRIVER, since it indicates that a
  driver will also later probe, so compatibles in this macro are not
  ignored.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20230828211424.2964562-3-nfraprado@collabora.com
Signed-off-by: Rob Herring <robh@kernel.org>