Move vela to a newer pin and remove patches we've merged upstream. (#2158)

Summary:
passes run.sh locally ready for ci fixes in #2143. They can import in any order.

Pull Request resolved: #2158

Reviewed By: mergennachin

Differential Revision: D54638819

Pulled By: digantdesai

fbshipit-source-id: 505cb8cf21af2961cbb39898e3a48209c79f8436

Author: robell

examples/arm/ethos-u-setup/ethos-u-vela/patches/0001-Improve-rescale-codegen-for-TOSA.patch

@@ -215,7 +215,7 @@ function setup_vela() {
     if [[ ! -e ethos-u-vela ]]; then
         git clone https://review.mlplatform.org/ml/ethos-u/ethos-u-vela
         repo_dir="${root_dir}/ethos-u-vela"
-        base_rev=00a15db3e1a188b25065d095152d701f4394cdc5
+        base_rev=78b9412b07e0a46e58e8ecb9da8d661399c006a5
         patch_repo
     fi
     cd "${root_dir}/ethos-u-vela"