There's no reason for Python and Perl support to be tied together, so
split the PACKAGECONFIG into two.
(From OE-Core rev: af1511065120b12600e39725d8507fa2c018ae1b)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>