spi: sun6i: add DT bindings for Allwinner R329/D1/R528/T113s SPI

spi: sun6i: add DT bindings for Allwinner R329/D1/R528/T113s SPI

Listed above Allwinner SoCs has two SPI controllers. First is the regular
SPI controller and the second one has additional functionality for
MIPI-DBI Type C.

Add compatible strings for these controllers

Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org
Reviewed-by: Andre Przywara <andre.przywara@arm.com
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com
Link: https://lore.kernel.org/r/20230510081121.3463710-2-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org