The usb3-hsphy for PXs3 SoC needs to accept 3 clocks like usb3-ssphy.

Fixes: 134ab284 ("dt-bindings: phy: Convert UniPhier USB3-PHY conroller to json-schema")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/1594198664-29381-1-git-send-email-hayashi.kunihiko@socionext.comSigned-off-by: Vinod Koul <vkoul@kernel.org>