west: boards: Use the new zcmake module name

Switch to the recently renamed zcmake module when importing the
run_cmake function.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

scripts/west_commands/boards.py

@@ -10,7 +10,7 @@
 
 from west import log
 from west.commands import WestCommand
-from cmake import run_cmake
+from zcmake import run_cmake
 
 class Boards(WestCommand):