Use the standard #defines for PCIe Link Capability register fields
rather than bare numbers.  This also uses the new PCI Express Capability
accessor rather than reading the capability directly.
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NSaurav Kashyap <saurav.kashyap@qlogic.com>
Acked-by: NGiridhar Malavali <giridhar.malavali@qlogic.com>