arm64: dts: renesas: r9a07g043: Fix SCI{Rx,Tx} interrupt types

As per the RZ/G2UL Hardware User's Manual (Rev.1.00 Apr, 2022),
the interrupt type of SCI{Rx,Tx} is edge triggered.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Fixes: cf40c968 ("arm64: dts: renesas: Add initial DTSI for RZ/G2UL SoC")
Link: https://lore.kernel.org/r/20220802101534.1401342-3-biju.das.jz@bp.renesas.com


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