dt-bindings: clock: qcom: ipq8074: add USB GDSCs

Add bindings for the USB GDSCs found in IPQ8074 GCC.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220515210048.483898-8-robimarko@gmail.com