ARM: dts: rockchip: enable DMA on SPI for rk3066 and rk3188
According to the RK3066 and RK3188 TRM, the two SPI controllers support DMA handshake interface. Add the DMA properties so they can be used when needed. Signed-off-by: NJulien CHAUVEAU <julien.chauveau@neo-technologies.fr> Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
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