arm64: dts: renesas: r8a77961: Add CAN nodes

Add the device nodes for all CAN nodes on R-Car M3-W+.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Link: https://lore.kernel.org/r/20210312025420.529339-3-yoshihiro.shimoda.uh@renesas.com


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