ASoC: Intel: board: Add Geminilake platform support

Geminilake also features rt298 codec, so use the same machine driver
as Broxton. Geminilake uses SSP2 instead of SSP5.

Signed-off-by: Pradeep Tewani <pradeep.d.tewani@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>