test/aports: detect linux-firmware-* in depends

All firmware packages go into subpackages nowadays, so we have them optional. The test/test_aports.py file has a test case, that makes sure that there are no firmware packages in the depends of a device package. So far we have only checked for firmware-* and linux-firmware, this commit makes it check for linux-firmware* as well.

In addition, the URL displayed in the "Please use kernel subpackages" message has been fixed (points to devicepkg instead of deviceinfo now).