dt-bindings: clock: Convert marvell,armada-3700-periph-clock to DT schema

dt-bindings: clock: Convert marvell,armada-3700-periph-clock to DT schema

Convert the Marvell Armada 3700 peripheral clock binding to DT schema
format. The north bridge is also a "syscon", so add the compatible to
it.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250521211826.77098-1-robh@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>