dt-bindings: can: renesas,rcar-canfd: Fix typo in pattern properties for R-Car V4M

The Renesas R-Car V4M(R8A779H0) SoC, supports up to four channels.
Fix the typo 5->4 in pattern properties.

Fixes: ced52c6e ("dt-bindings: can: renesas,rcar-canfd: Document R-Car V4M support")
Cc: stable@vger.kernel.org
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20250307170330.173425-2-biju.das.jz@bp.renesas.com


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>