linux-phytec-ti

Documentation: dt: xgene: Add PMD clock binding

Add APM X-Gene clock binding documentation for PMD clock.

Signed-off-by: Hoan Tran <hotran@apm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>