ASoC: stm32: spdifrx: fix regmap status check

Release resources when exiting on error.

Fixes: 1a5c0b28fc ("ASoC: stm32: spdifrx: manage identification registers")

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20200318144125.9163-2-olivier.moysan@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/stm/stm32_spdifrx.c

@@ -1009,6 +1009,8 @@ static int stm32_spdifrx_probe(struct platform_device *pdev)
 
 	if (idr == SPDIFRX_IPIDR_NUMBER) {
 		ret = regmap_read(spdifrx->regmap, STM32_SPDIFRX_VERR, &ver);
+		if (ret)
+			goto error;
 
 		dev_dbg(&pdev->dev, "SPDIFRX version: %lu.%lu registered\n",
 			FIELD_GET(SPDIFRX_VERR_MAJ_MASK, ver),