This reverts commit 4c2604a9.

Asynch probe caused regression in a setup with both Renesas and Intel xHC
controllers. Devices connected to the Renesas disconnected shortly after
boot. With Asynch probe the busnumbers got interleaved.

xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1
xhci_hcd 0000:04:00.0: new USB bus registered, assigned bus number 2
xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3
xhci_hcd 0000:04:00.0: new USB bus registered, assigned bus number 4

Reason why this commit causes regression is still unknown, but revert it
while debugging the issue.

Fixes: 4c2604a9 ("usb: xhci-pci: Set PROBE_PREFER_ASYNCHRONOUS")
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/linux-usb/20230307132120.5897c5af@deangelis.fenrir.org.ukSigned-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230330143056.1390020-3-mathias.nyman@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>