staging: et131x: Move pm calls from pci device to driver device

Move the pci driver suspend/resume calls up to the driver.pm ops
structure, as they are not pci device specific.

Thanks to Francois Romieu <romieu@fr.zoreil.com> for pointing this out.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>