spi: dt-bindings: renesas,rzv2h-rspi: Document dmas property
Document the dmas property to state it must be specified as TX/RX DMA
specifier pairs.
This clarifies the expected ordering and improves binding readability
without changing behavior.
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/ea6ed3b82c5a326732adfc0fcdb2922bfcad2591.1771344527.git.tommaso.merciai.xr@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>