ARM: dts: imx: Switch Boundary Devices boards to SPDX identifier
Adopt the SPDX license identifier headers to ease license compliance
management.
Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
authored by