aml: support multiple interrupt numbers

[lgfa29]

Summary of the PR

The ACPI spec allows multiple interrupt numbers to be specified in the extended interrupt descriptor.

This is breaking change, so it probably needs further consideration before merge. A few options to avoid breaking the API include:

1. create a separate struct to generate Interrupts with multiple numbers.
2. keep the constructor the same, but add a new method to include additional numbers.

Let me know how what would be preference and I can adjust the PR.

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