2.8.0 is the maximum version for mbedtls

src/freedombone-image-customise

@@ -834,7 +834,7 @@ install_bmx7() {
 
     git clone "$BMX7_REPO" "$rootdir/etc/bmx7"
 
-    MBEDTLS_VERSION='2.11.0'
+    MBEDTLS_VERSION='2.8.0'
 
     cat <<EOF > "$rootdir/usr/bin/install_bmx7"
 #!/bin/bash