SoC: intel: byt: Introduce new custom IN2 map

Introduce a new custom dapm routes map to quirk platforms with the
internal mic connected to IN2P.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>