Commit fe78d0b7 ("spi: sh-msiof: Fix FIFO size to 64 word from
256 word") changed the default RX FIFO size on R-Car Gen2 SoCs in the
driver code, but forgot to update the DT bindings documentation.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NMark Brown <broonie@kernel.org>