ARM: dts: rockchip: Do not describe unexisting DAC device on rv1108-elgin-r1

ARM: dts: rockchip: Do not describe unexisting DAC device on rv1108-elgin-r1

There is no DAC connected to the SPI bus of the Elgin RV1108 R1 board.

There is a JG10309-01 LCD controlled via SPI though.

Properly describe it by adding the "elgin,jg10309-01" compatible
string.

Reported-by: Conor Dooley <conor.dooley@microchip.com>
Closes: https://lore.kernel.org/linux-arm-kernel/20240717-parrot-malt-83cc04bf6b36@spud/
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20240829113158.3324928-3-festevam@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>