ASoC: zte: Fix incorrect PCM format bit usages

zx-tdm driver sets the DAI driver definitions with the format bits
wrongly set with SNDRV_PCM_FORMAT_*, instead of SNDRV_PCM_FMTBIT_*.

This patch corrects the definitions.

Spotted by a sparse warning:
  sound/soc/zte/zx-tdm.c:363:35: warning: restricted snd_pcm_format_t degrades to integer

Fixes: 870e0ddc ("ASoC: zx-tdm: add zte's tdm controller driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>