scripts/lib/bsp/engine.py: Added missing keyword to fix syntax error

Commit af9f6b88fcc5d7fddff01595f9bcf2aba548720 introduced a syntax
error in engine.py by removing keyword "in". This patch adds it back.

[Yocto #9719]

(From meta-yocto rev: 49f02f3344617f8b077edf61e8f5ead05e8405eb)

Signed-off-by: Humberto Ibarra <humberto.ibarra.lopez@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/bsp/engine.py

@@ -1654,7 +1654,7 @@ def get_properties(input_lines):
         props = line.props
         item = {}
         name = props["name"]
-        for key, val props.items():
+        for key, val in props.items():
             if not key == "name":
                 item[key] = val
         properties[name] = item