dt-bindings: clock: qcom,gcc-msm8996: add more GCC clock sources

Add additional GCC clock sources. This includes PCIe and USB PIPE and
UFS symbol clocks.

Fixes: 2a8aa18c ("dt-bindings: clk: qcom: Fix self-validation, split, and clean cruft")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220620071936.1558906-2-dmitry.baryshkov@linaro.org