[netdrvr pci-skeleton] refresh

[netdrvr pci-skeleton] refresh

Here it is.  The patch fixes all compile errors and warnings in
pci-skeleton.c.  The "debug" parameter lacks corresponding variable,
so I removed it to avoid a warning on module load.  Obsolete
pci_power_on() and pci_power_off() have been replaced with the new
code using pci_set_power_state(), pci_save_state() and
pci_restore_state().  The driver has been tested by compiling it as
module and as part of the kernel.