ASoC: SOF: ipc3: Use devm_kmemdup to replace devm_kmalloc + memcpy

Use the helper function devm_kmemdup() rather than duplicating its
implementation, which helps to enhance code readability.
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20230810114738.2103792-3-lizetao1@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc3.c

@@ -567,13 +567,10 @@ int sof_ipc3_get_cc_info(struct snd_sof_dev *sdev,
 	/* create read-only cc_version debugfs to store compiler version info */
 	/* use local copy of the cc_version to prevent data corruption */
 	if (sdev->first_boot) {
-		sdev->cc_version = devm_kmalloc(sdev->dev, cc->ext_hdr.hdr.size,
-						GFP_KERNEL);
-
+		sdev->cc_version = devm_kmemdup(sdev->dev, cc, cc->ext_hdr.hdr.size, GFP_KERNEL);
 		if (!sdev->cc_version)
 			return -ENOMEM;
 
-		memcpy(sdev->cc_version, cc, cc->ext_hdr.hdr.size);
 		ret = snd_sof_debugfs_buf_item(sdev, sdev->cc_version,
 					       cc->ext_hdr.hdr.size,
 					       "cc_version", 0444);