arch/quark_se: Switch to native SPI DW driver

QMSI is not updated to latest SPI API. Switching to native DW driver,
until we find a way either to update the shim drivers in a
non-performant way, or updating QMSI itself enabling support for
scatter-gather type of buffers.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>