efi_loader: rename struct efi_initrd_dp to efi_lo_dp_prefix

As we now also store device-tree device-paths in load options rename
struct efi_initrd_dp to efi_lo_dp_prefix.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index 0830591..1a191eb 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.c
@@ -684,7 +684,7 @@
 	struct efi_device_path *dp = NULL;
 	const struct efi_device_path *dp_prefix;
 	efi_status_t ret;
-	const struct efi_initrd_dp fdt_dp = {
+	const struct efi_lo_dp_prefix fdt_dp = {
 		.vendor = {
 			{
 			DEVICE_PATH_TYPE_MEDIA_DEVICE,
@@ -699,7 +699,7 @@
 			sizeof(fdt_dp.end),
 		}
 	};
-	const struct efi_initrd_dp initrd_dp = {
+	const struct efi_lo_dp_prefix initrd_dp = {
 		.vendor = {
 			{
 			DEVICE_PATH_TYPE_MEDIA_DEVICE,