ASoC: SOF: AMD: simplify return status handling

cppcheck warning:

sound/soc/sof/amd/acp.c:222:9: warning: Identical condition and return
expression 'ret', return value is always 0
[identicalConditionAfterEarlyExit]
 return ret;
        ^
sound/soc/sof/amd/acp.c:213:6: note: If condition 'ret' is true, the
function will return/exit
 if (ret)
     ^
sound/soc/sof/amd/acp.c:222:9: note: Returning identical expression 'ret'
 return ret;
        ^

Just return 0; on success.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Author: plbossart

sound/soc/sof/amd/acp.c

@@ -219,7 +219,7 @@ int configure_and_run_sha_dma(struct acp_dev_data *adata, void *image_addr,
 		return -EINVAL;
 	}
 
-	return ret;
+	return 0;
 }
 
 int acp_dma_status(struct acp_dev_data *adata, unsigned char ch)