PCI: Use PCI_CLASS_SERIAL_USB instead of bare number
PCI: Use PCI_CLASS_SERIAL_USB instead of bare number

be6646bfbaec ("PCI: Prevent xHCI driver from claiming AMD Nolan USB3 DRD
device") added a quirk to override the PCI class code of the AMD Nolan
device.

Use PCI_CLASS_SERIAL_USB instead of a bare number to improve greppability.
Also add a log message about what we're doing.

No functional change except the new message.

Signed-off-by: Bjorn Helgaas <f10ec01be0c6b54271af5c550cd257810bdf3268@google.com>
Acked-by: Huang Rui <3d137cbcc79a0a89c72e4e9b642446ed2999ace4@amd.com>
CC: Jason Chang <b1361a8a02382b8ba4ffb2ca5855211514a69e3b@amd.com>
CC: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>
KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs