This means if PKGARCHCOMPAT_ARMV7A is set, "armv7a-vfp-neon" is renamed
to be "armv7a". Other compatibility mappings can be added as needed.
(From OE-Core rev: 08c0b7060009113e8dffdef51ff6b9b4b7f28894)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>