BACKPORT: PCI: dwc: Don't wait for link up if driver can detect Link Up event

If the driver can detect the Link Up event and enumerate downstream devices
at that time, we need not wait here.

Skip waiting for link to come up if the driver supports 'use_linkup_irq'.

Link: https://lore.kernel.org/r/20241123-remove_wait2-v5-1-b5f9e6b794c2@quicinc.com


Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
[bhelgaas: wrap comment, update commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>

Bug: 374242499
Change-Id: I0ecc36d8fedf45e7ceead3bbef0b038243547762
(cherry picked from commit 8d3bf19f)
[ajayagarwal: use PCIe capabilities to avoid breaking the ABI]
Signed-off-by: Ajay Agarwal <ajayagarwal@google.com>