Add dt binding documentation details for Lattice MachXO2 FPGA configuration
over Slave SPI interface.
Signed-off-by: NPaolo Pisati <p.pisati@gmail.com>
Acked-by: NRob Herring <robh@kernel.org>
Acked-by: NAlan Tull <atull@kernel.org>
Signed-off-by: NMoritz Fischer <mdf@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>