Upstream has fixed their use of aclocal.m4 vs acinclude.m4, so now we can remove
some hacks that were previously required.
(From OE-Core rev: 502cdfe3dd5ea3cd70937c92ff1bd8d6faa829eb)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>