mips64 support was recently added to the core BSPs; we should also
support it in yocto-bsp. [YOCTO #5314]
(From meta-yocto rev: 3f3d29e2df6462c915d0763ab07f3be3c739ca4d)
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>