dt-bindings: serial: snps-dw-apb-uart: Simplify DMA-less RZ/N1 rule

dt-bindings: serial: snps-dw-apb-uart: Simplify DMA-less RZ/N1 rule

There is no need to repeat all SoC-specific compatible values in the
rule for DMA-less RZ/N1 variants.  Use wildcard "{}" instead, to ease
maintenance.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/90c7aa143beb6a28255b24e8ef8c96180d869cbb.1744271974.git.geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>