Working towards a more generic bootimg.bbclass, pull out all
syslinux specific bits and let syslinux.bbclass manage them
directly. This introduces no functional changes to the images
constructed and the behavior remains unchanged.
(From OE-Core rev: 1915293688d348a765aa0bcdf01168c9fecd9842)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>