ci: add more targets to `.eil.yml`

[trombik]

The issue

the CI includes other targets (see 4be76b0). these new targets are not tested by CI because .eil.yml does not include the targets.

The context

the components in the repository are mostly target-independent. there are few differences we depend on, such as macros definitions like SPI name, number of available channels. as such, the components should be marked as "supported" by default.

if a component does not work because of differences in a target (and cannot be fixed by the component), the target will be removed from .eil.yml.

Possible solution

update .eil.yml with the new targets.

Confirmation

• [X] This report is not a bug report in code, a question, nor a request for drivers.

[trombik]

the fix should include:

• a section that describes this policy in CONTRIBUTING.md
• updates to README.yml (supported targets)

[trombik]

see also #488. the helper needs modifications, too.