ASoC: pcm3168a: add hw constraint for capture channel

LEFT_J / I2S only can use TDM.
commit 594680ea ("ASoC: pcm3168a: add hw constraint for channel")
commit 38096889 ("ASoC: pcm3168a: add HW constraint for non
RIGHT_J") added channel constraint for it, but, it was only for playback.
This patch adds constraint for capture.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>