This changes qemu_xtensa to use dc233c core instead of
sample_controller. The sample_controller uses a very
basic configuration which lacks features usually needed
in real world applications. Instead, use the dc233c core
as the base for qemu_xtensa so we can use QEMU to cover
more of our code path.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This adds SoC and board configs to support the dc233c core
that is available on QEMU. This core has more features than
sample_controller, such as MMU support.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>