arm64: dts: broadcom: Assign clock rates in eth node for RPi5

arm64: dts: broadcom: Assign clock rates in eth node for RPi5

In Raspberry Pi 5 DTS, the Ethernet clock rates must be assigned
as the default clock register values are not valid for the
Ethernet interface to function.
This can be done either in rp1_clocks node or in rp1_eth node.

Define the rates in rp1_eth node, as those clocks are 'leaf' clocks
used specifically by the Ethernet device only.

Fixes: 43456fdfc014 ("arm64: dts: broadcom: Enable RP1 ethernet for Raspberry Pi 5")
Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
Link: https://lore.kernel.org/r/20251021135533.5517-1-andrea.porta@suse.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>