dt-bindings: phy: qcom,m31-eusb2-phy: Document M31 eUSB2 PHY for Kaanapali

dt-bindings: phy: qcom,m31-eusb2-phy: Document M31 eUSB2 PHY for Kaanapali

Document M31 eUSB2 PHY for Kaanapali which handles the USB2 path. Use
fallback to indicate the compatibility of the M31 eUSB2 PHY on the
Kaanapali with that on the SM8750.

Signed-off-by: Ronak Raheja <ronak.raheja@oss.qualcomm.com>
Co-developed-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com>
Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com>
Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260108052459.1819970-3-krishna.kurapati@oss.qualcomm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>