There are a few remaining drivers/staging/*/Kconfig files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.
# SPDX-License-Identifier: GPL-2.0
config STAGING_BOARD
bool "Staging Board Support"
depends on OF_ADDRESS && OF_IRQ && CLKDEV_LOOKUP
help
Select to enable per-board staging support code.
If in doubt, say N here.
