eclair/utils_tfm.sh: TF-M specific utils for ECLAIR

Keep these seperate from generic ECLAIR utils in utils.sh.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Icc95f1cff8c80905e38dca385a2df7a453011ab1
diff --git a/eclair/utils_tfm.sh b/eclair/utils_tfm.sh
new file mode 100644
index 0000000..783e036
--- /dev/null
+++ b/eclair/utils_tfm.sh
@@ -0,0 +1,4 @@
+eclair_tfm_set_toolchain_path() {
+    path_cmd=$(python3 tf-m-ci-scripts/configs.py -b -g all $CONFIG_NAME | head -n1)
+    eval $path_cmd
+}