bcmkernel: bcm_git: Require WiFi patch script to exist

Signed-off-by: Andreas Gnau <andreas.gnau@iopsys.eu>

bcmkernel/scripts/bcm_git.sh

@@ -195,15 +195,15 @@ import_module()
         rm -f $repo/git_tmp/INSTALL-src-wifi.txt
         # move the files
         rsync -a "$repo/git_tmp/" "$repo/bcm963xx/"
-        # sometimes they also include patches
+        #  They also include patches which are applied using a script
         local apply_bsp_patch_script="$repo/bcm963xx/dopatch"  # new patch script from 5.04L.04
         if [ -x "$apply_bsp_patch_script" ]; then
             echo "Applying bsp-patches using script $(basename "$apply_bsp_patch_script")"
             (cd "$(dirname "$apply_bsp_patch_script")" && "./$(basename "$apply_bsp_patch_script")" apply)
         else
-            echo "No bsp-patches script $apply_bsp_patch_script found."
+            echo "Error: No bsp-patches script $apply_bsp_patch_script found."
+            return 1
         fi
-
         ;;
     wifi_src-*)
         # The new wifi src packages from 5.04L.03 onwards will only contain the impl src files for the