ASoC: stm32: sai: fix warning in stm32_sai_set_config()

Fix uninitialized warning introduced by
"Move static settings to DAI init" commit
in stm32_sai_set_config() function.
Signed-off-by: NOlivier Moysan <olivier.moysan@st.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/stm/stm32_sai_sub.c

@@ -482,13 +482,13 @@ static int stm32_sai_set_config(struct snd_soc_dai *cpu_dai,
 	cr1_mask = SAI_XCR1_DS_MASK;
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_S8:
-		cr1 |= SAI_XCR1_DS_SET(SAI_DATASIZE_8);
+		cr1 = SAI_XCR1_DS_SET(SAI_DATASIZE_8);
 		break;
 	case SNDRV_PCM_FORMAT_S16_LE:
-		cr1 |= SAI_XCR1_DS_SET(SAI_DATASIZE_16);
+		cr1 = SAI_XCR1_DS_SET(SAI_DATASIZE_16);
 		break;
 	case SNDRV_PCM_FORMAT_S32_LE:
-		cr1 |= SAI_XCR1_DS_SET(SAI_DATASIZE_32);
+		cr1 = SAI_XCR1_DS_SET(SAI_DATASIZE_32);
 		break;
 	default:
 		dev_err(cpu_dai->dev, "Data format not supported");