device_util.c: Replace `memcpy()` with `strcpy()`

Use `strcpy()` instead of `memcpy()` to copy string literals.

Change-Id: I8ebf591e3348d992739ed7cc2e4015aa650f115a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57013
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/device/device_util.c b/src/device/device_util.c
index 9e71287..7b72a94 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -152,14 +152,14 @@
 
 	buffer[0] = '\0';
 	if (!dev) {
-		memcpy(buffer, "<null>", 7);
+		strcpy(buffer, "<null>");
 	} else {
 		switch (dev->path.type) {
 		case DEVICE_PATH_NONE:
-			memcpy(buffer, "NONE", 5);
+			strcpy(buffer, "NONE");
 			break;
 		case DEVICE_PATH_ROOT:
-			memcpy(buffer, "Root Device", 12);
+			strcpy(buffer, "Root Device");
 			break;
 		case DEVICE_PATH_PCI:
 			snprintf(buffer, sizeof(buffer),