There's no need to do alternatives as pkgconf and pkg-config won't be installed
at the same time, and pkg-config doesn't do alternatives either.
(From OE-Core rev: d638fe0cc84b72b9159767a862ad37550469eae8)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>