dt-bindings: clock: versal: Add versal-net compatible string

dt-bindings: clock: versal: Add versal-net compatible string

Add dt-binding documentation for Versal NET platforms.
Versal Net is a new AMD/Xilinx  SoC.

The SoC and its architecture is based on the Versal ACAP device.
The Versal Net  device includes more security features in the
platform management controller (PMC) and increases the number of
CPUs in the application processing unit (APU) and the real-time
processing unit (RPU).

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Link: https://lore.kernel.org/r/20230620110137.5701-1-shubhrajyoti.datta@amd.com
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>