dt-bindings: clock: qcom: ipq8074: Add missing bindings for PCIe

Add missing clock bindings for PCIe port0 of ipq8074.

Co-developed-by: Selvam Sathappan Periakaruppan <speriaka@codeaurora.org>
Signed-off-by: Selvam Sathappan Periakaruppan <speriaka@codeaurora.org>
Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Link: https://lore.kernel.org/r/1593940680-2363-4-git-send-email-sivaprak@codeaurora.org


[sboyd@kernel.org: Clean up commit text subject]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>