ASoC: Intel: Skylake: Add 16-bit constraint to FE bxt_rt298 machine

Add constraint to FE to restrict sample format to 16-bit for bxt_rt298
machine
Signed-off-by: G Kranthi <gudishax.kranthikumar@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bxt_rt298.c

@@ -274,12 +274,15 @@ static int bxt_fe_startup(struct snd_pcm_substream *substream)
 	 * on this platform for PCM device we support:
 	 *      48Khz
 	 *      stereo
+	 *	16-bit audio
 	 */
 
 	runtime->hw.channels_max = 2;
 	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 				&constraints_channels);
 
+	runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
+	snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
 	snd_pcm_hw_constraint_list(runtime, 0,
 				SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);