arm64: dts: renesas: r8a779f0: Add SCIF nodes

Extracted from a bigger patch in the BSP, rebased, reg length corrected,
and DMA properties added.

Signed-off-by: Linh Phung <linh.phung.jy@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20220614095242.8264-1-wsa+renesas@sang-engineering.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>