Add the missing unlock before return from function
snd_cs4231_playback_prepare() in the error handling
case.
Fixes: 
		
	
					 | 
			||
|---|---|---|
| .. | ||
| amd7930.c | ||
| cs4231.c | ||
| dbri.c | ||
| Kconfig | ||
| Makefile | ||
				Add the missing unlock before return from function
snd_cs4231_playback_prepare() in the error handling
case.
Fixes: 
		
	
					 | 
			||
|---|---|---|
| .. | ||
| amd7930.c | ||
| cs4231.c | ||
| dbri.c | ||
| Kconfig | ||
| Makefile | ||