dt-bindings: Add AXG PCIE PHY bindings

Add documentation for PCIE PHYs found in AXG SoCs.

Signed-off-by: Remi Pommarel <repk@triplefau.lt>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
1 file changed