Add reset_methods[] in struct pci_dev to keep track of reset mechanisms
supported by the device and their ordering.

Refactor probing and reset functions to take advantage of calling
convention of reset functions.
Co-developed-by: NAlex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20210817180500.1253-4-ameynarkhede03@gmail.comSigned-off-by: NAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: NAmey Narkhede <ameynarkhede03@gmail.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NRaphael Norwitz <raphael.norwitz@nutanix.com>