trees: simplified multi-tree bare repo clone

the git_prep function already creates the given
directory where source code goes, so we don't
need to do it from the trees script.

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/trees

@@ -120,6 +120,7 @@ handle_src_tree()
 {
 	target_dir="$cfgsdir/$target"
 
+	fetch_project "$project"
 	load_target_config "$target_dir" || return 1
 	x_ mkdir -p "$elfdir/$target"
 
@@ -141,9 +142,6 @@ handle_src_tree()
 
 load_target_config()
 {
-	[ "$cmd" = "build_targets" ] && [ ! -d "src/$project/$project" ] && \
-	    x_ mkdir -p "src/$project" && fetch_project "$project"
-
 	eval `setvars "" xarch xlang bootstrapargs autoconfargs xtree \
 	    tree_depend makeargs btype mkhelper`
 	[ -f "$1/target.cfg" ] || btype="auto"