resources: Add missing field to resources.json

Change-Id: I14af61945a852b94eef60e163b611da72eb7bcb2
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/54825
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 0502761..316a960 100644
--- a/resources.json
+++ b/resources.json
@@ -157,6 +157,7 @@
                     "name" : "riscv-lupio-linux-kernel",
                     "documentation": "A kernel built with LupIO device (https://gitlab.com/luplab/lupio) drivers. Must be used when setting LupIO board workloads. Compataible with the 'riscv-lupio-busybox-img' disk image resource.",
                     "is_zipped" : false,
+                    "architecture" : "RISCV",
                     "md5sum" : "f94351edbbb0e7bd9617f7b381635546",
                     "url" : "{url_base}/kernels/riscv/static/lupio-linux",
                     "source" : null