ARM: dts: rockchip: Add Relfor Saib board

Saib is an consumer electronics board from Relfor labs
Features:
    - Rockchip RV1109
    - 1GB DDR4
    - 4GB eMMC
    - Realtek RTL8821CS Wi-Fi/BT
    - IR transmitter/receiver
    - RV3028 RTC
    - Switch
    - User leds

Add support for it.

Signed-off-by: Karthikeyan Krishnasamy <karthikeyan@linumiz.com>
Link: https://lore.kernel.org/r/20240912142451.2952633-7-karthikeyan@linumiz.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: karthi012

arch/arm/boot/dts/rockchip/Makefile

@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rv1108-elgin-r1.dtb \
 	rv1108-evb.dtb \
+	rv1109-relfor-saib.dtb \
 	rv1109-sonoff-ihost.dtb \
 	rv1126-edgeble-neu2-io.dtb \
 	rv1126-sonoff-ihost.dtb \