PCI: starfive: Fix unchecked pm_runtime_get_sync() in probe

pm_runtime_get_sync() is called in starfive_pcie_probe() without
checking its return value. If runtime resume fails, the driver
proceeds to configure PCIe hardware through regmap_update_bits(),
enable clocks and resets, and power on the PHY, even though the
device may not actually be powered.

pm_runtime_get_sync() also increments the usage counter even when
resume fails, which would leave the counter unbalanced if this
error path were later handled without additional cleanup.

Switch to pm_runtime_resume_and_get(), which balances the usage
counter internally on failure, and bail out of probe before any
hardware is touched if resume does not succeed.

Tested on StarFive VisionFive 2 v1.2A board.

Fixes: 6168efbebace ("PCI: starfive: Enable controller runtime PM before probing host bridge")
Signed-off-by: Ali Tariq <alitariq45892@gmail.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Link: https://patch.msgid.link/20260718153352.661930-1-alitariq45892@gmail.com

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