resources: Add an arm64 bootloader

Note: Sources for this resource do not exist.
Change-Id: I67cfcde49a4bba8059dcdd15d17d5cfaa41025cd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/59130
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
diff --git a/resources.json b/resources.json
index 17d6ba1..a9642fc 100644
--- a/resources.json
+++ b/resources.json
@@ -130,6 +130,16 @@
             "source" : "src/riscv-boot-exit-nodisk"
         },
         {
+        },
+            "type": "resource",
+            "name" : "arm64-bootloader",
+            "documentation" : "An arm64 bootloader. May be used with the 'arm64-linux-kernel-*' resources.",
+            "architecture": "ARM",
+            "is_zipped" : false,
+            "md5sum" : "4ac285462723f2574c71526ae6717d24",
+            "url": "{url_base)/bootloaders/arm/arm64-bootloader-20220425",
+            "source" : null
+        {
             "type" : "group",
             "name" : "linux-kernel",
             "contents" : [