There are a few remaining drivers/staging/*/Makefile files that do not have SPDX identifiers in them. Add the correct GPL-2.0 identifier to them to make scanning tools happy.
Reviewed-by: Mukesh Ojha Signed-off-by: Greg Kroah-Hartman
# SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_PI433) += pi433.o pi433-objs := pi433_if.o rf69.o