PCI: mediatek-gen3: Enable async probe by default

The mediatek-gen3 driver can run its probe routine fairly slow on some
hardware, which adds to the total time it takes for the system start up.

Thus, turn on async mode for the probe to avoid blocking the rest of the
system.

Link: https://lore.kernel.org/r/20241220145205.1.Ibf2563896c3b1fc133bb46d3fc96ad0041763922@changeid
Signed-off-by: Douglas Anderson <[email protected]>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>

Author: dianders

drivers/pci/controller/pcie-mediatek-gen3.c

@@ -1335,6 +1335,7 @@ static struct platform_driver mtk_pcie_driver = {
 		.name = "mtk-pcie-gen3",
 		.of_match_table = mtk_pcie_of_match,
 		.pm = &mtk_pcie_pm_ops,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 };