Update Ethos-U SDK version

Update tag to 24.08 and also bump core_platform forward to
get support for Corstone-320.

Signed-off-by: Per Åstrand <[email protected]>
Change-Id: If16fedd62a16b56e7132ba080d8c642d932240df

Author: per

examples/arm/setup.sh

@@ -76,7 +76,7 @@ fi
 
 # ethos-u
 ethos_u_repo_url="https://review.mlplatform.org/ml/ethos-u/ethos-u"
-ethos_u_base_rev="24.05"
+ethos_u_base_rev="24.08"
 
 ########
 ### Mandatory user args
@@ -163,7 +163,7 @@ function patch_repo() {
     name="$(basename $repo_dir)"
     echo -e "[${FUNCNAME[0]}] Preparing ${name}..."
     cd $repo_dir
-
+    git fetch
     git reset --hard ${base_rev}
 
     patch_dir=${script_dir}/ethos-u-setup/${name}/patches/
@@ -261,7 +261,7 @@ setup_ethos_u
 
 # Patch the ethos-u dev environment to include executorch application
 repo_dir="${root_dir}/ethos-u/core_platform"
-base_rev=204210b1074071532627da9dc69950d058a809f4
+base_rev=b728c774158248ba2cad8e78a515809e1eb9b77f
 patch_repo
 
 # Setup the tosa_reference_model