ASoC: doc: Replace dpcm_playback/capture to playback/capture_assertion

.dpcm_playback/capture flags are converted to playback/capture_assertion
flag. Let's follow it on Documentation.

Signed-off-by: Kuninori Morimoto <[email protected]>

Documentation/sound/soc/dpcm.rst

@@ -157,14 +157,14 @@ FE DAI links are defined as follows :-
 		.codec_dai_name = "snd-soc-dummy-dai",
 		.dynamic = 1,
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
-		.dpcm_playback = 1,
+		.playback_assertion = 1,
 	},
 	.....< other FE and BE DAI links here >
   };
 
 This FE DAI link is pretty similar to a regular DAI link except that we also
 set the DAI link to a DPCM FE with the ``dynamic = 1``. The supported FE stream
-directions should also be set with the ``dpcm_playback`` and ``dpcm_capture``
+directions can set with the ``playback_assertion`` and ``capture_assertion``
 flags. There is also an option to specify the ordering of the trigger call for
 each FE. This allows the ASoC core to trigger the DSP before or after the other
 components (as some DSPs have strong requirements for the ordering DAI/DSP
@@ -189,15 +189,15 @@ The BE DAIs are configured as follows :-
 		.ignore_pmdown_time = 1,
 		.be_hw_params_fixup = hswult_ssp0_fixup,
 		.ops = &haswell_ops,
-		.dpcm_playback = 1,
-		.dpcm_capture = 1,
+		.playback_assertion = 1,
+		.capture_assertion = 1,
 	},
 	.....< other BE DAI links here >
   };
 
 This BE DAI link connects DAI0 to the codec (in this case RT5460 AIF1). It sets
 the ``no_pcm`` flag to mark it has a BE and sets flags for supported stream
-directions using ``dpcm_playback`` and ``dpcm_capture`` above.
+directions using ``playback_assertion`` and ``capture_assertion`` above.
 
 The BE has also flags set for ignoring suspend and PM down time. This allows
 the BE to work in a hostless mode where the host CPU is not transferring data