devicetree/bindings: add support for CP110 UTMI PHY

Add DTS binding for Marvell CP110 UTMI PHY

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210307163343.25684-4-kostap@marvell.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>