ASoC: sdw_utils: Fix potential NULL pointer deref in is_sdca_endpoint_present()

Check the return value of kzalloc() and exit early to avoid a potential
NULL pointer dereference.

Cc: stable@vger.kernel.org
Fixes: 4f8ef33 ("ASoC: soc_sdw_utils: skip the endpoint that doesn't present")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20250610103225.1475-2-thorsten.blum@linux.dev
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: toblux

sound/soc/sdw_utils/soc_sdw_utils.c

@@ -1205,6 +1205,8 @@ static int is_sdca_endpoint_present(struct device *dev,
 	int i;
 
 	dlc = kzalloc(sizeof(*dlc), GFP_KERNEL);
+	if (!dlc)
+		return -ENOMEM;
 
 	adr_end = &adr_dev->endpoints[end_index];
 	dai_info = &codec_info->dais[adr_end->num];