Revert "PCI: Clear PCI_STATUS when setting up device"

This reverts commit 6cd514e.

Christophe Fergeau reported that 6cd514e ("PCI: Clear PCI_STATUS when
setting up device") causes boot failures when trying to start linux guests
with Apple's virtualization framework (for example using
https://developer.apple.com/documentation/virtualization/running_linux_in_a_virtual_machine?language=objc)

6cd514e only solved a cosmetic problem, so revert it to fix the boot
failures.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=2137803
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/probe.c

@@ -1891,9 +1891,6 @@ int pci_setup_device(struct pci_dev *dev)
 
 	dev->broken_intx_masking = pci_intx_mask_broken(dev);
 
-	/* Clear errors left from system firmware */
-	pci_write_config_word(dev, PCI_STATUS, 0xffff);
-
 	switch (dev->hdr_type) {		    /* header type */
 	case PCI_HEADER_TYPE_NORMAL:		    /* standard header */
 		if (class == PCI_CLASS_BRIDGE_PCI)