Add support for SA8775P SoC to the Qualcomm PCIe Endpoint Controller
driver. Adding new compatible string as it has different set of clocks
compared to other SoCs.

Link: https://lore.kernel.org/linux-pci/1714492540-15419-3-git-send-email-quic_msarkar@quicinc.comSigned-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>