UPSTREAM: dt-bindings: usb: snps,dwc3: Fix "snps,hsphy_interface" type

The "snps,hsphy_interface" is string, not u8. Fix the type.

Bug: 254441685
Fixes: 389d7765 ("dt-bindings: usb: Convert DWC USB3 bindings to DT schema")
Cc: stable <stable@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20230515172456.179049-1-marex@denx.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 7b32040f)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: Ib4446daf612a48b844fb783f27d24f2d24ea1e5d