remoteproc: keystone: Use devm_kasprintf() to build name string

This is simpler and removes the need to assume the id length to be 1
digit, which then removes a W=1 compile warning about the same.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240802182300.244055-1-afd@ti.comSigned-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

drivers/remoteproc/keystone_remoteproc.c

@@ -366,8 +366,6 @@ static int keystone_rproc_probe(struct platform_device *pdev)
 	struct rproc *rproc;
 	int dsp_id;
 	char *fw_name = NULL;
-	char *template = "keystone-dsp%d-fw";
-	int name_len = 0;
 	int ret = 0;
 
 	if (!np) {
@@ -382,11 +380,9 @@ static int keystone_rproc_probe(struct platform_device *pdev)
 	}
 
 	/* construct a custom default fw name - subject to change in future */
-	name_len = strlen(template); /* assuming a single digit alias */
-	fw_name = devm_kzalloc(dev, name_len, GFP_KERNEL);
+	fw_name = devm_kasprintf(dev, GFP_KERNEL, "keystone-dsp%d-fw", dsp_id);
 	if (!fw_name)
 		return -ENOMEM;
-	snprintf(fw_name, name_len, template, dsp_id);
 
 	rproc = rproc_alloc(dev, dev_name(dev), &keystone_rproc_ops, fw_name,
 			    sizeof(*ksproc));