ASoC: rt5645: add TDM slot control into dapm route

This patch adds TDM slot control into dapm route. The control bits
are different between rt5645 and rt5650, so we have separate dapm
routes for each codec.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>