arm64: dts: renesas: rzg2: Increase CANFD clock rates

arm64: dts: renesas: rzg2: Increase CANFD clock rates

Currently, all RZ/G2 .dtsi files configure the CANFD core clocks to 40
MHz, which limits CAN-FD data transfer rates to 4 Mbps.  However, all
RZ/G2 SoCs support CANFD clock rates up to 80 MHz.

Now the R-Car CAN-FD driver has gained support for Transceiver Delay
Compensation, increase all appropriate CANFD clock rates to the
documented maximum, to support data rates up to 8 Mbps.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/0dd1c17135707587e9e9d6d68b2eaa1921fbcb7a.1755090456.git.geert+renesas@glider.be