Now that all boards/cpus are migrated to Kconfig, we don't need this list anymore and it will enforce new boards to be adapted as well
Kconfig features test
The objective of this test is to control the synchronization of features
provided by boards via Makefile.features and Kconfig files during the
migration process.
It also checks that multiple common variables (e.g. CPU_MODEL) have the same value in the Makefiles and in Kconfig.
The test checks during compilation that both lists of features provided by
the board match. The BOARD_WHITELIST is used to test only the boards that have
their features modelled in Kconfig.