Move to newer vela pin without need for patches

Signed-off-by: Rob Elliott <[email protected]>

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"