85xx/p1_p2_rdb: PCIe E1000 card support added.

Enables the Intel Pro/1000 PT Gb Ethernet PCI-E Network Adapter
configuration support for P1/P2 RDB.

Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>