amd-xgbe: Restore PCI interrupt enablement setting on resume

[ Upstream commit cfd092f2db8b4b6727e1c03ef68a7842e1023573 ]

After resuming from suspend, the PCI device support must re-enable the
interrupt setting so that interrupts are actually delivered.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>