This patch changes the MIPS Octeon defconfig to enable some features
for PCIe enablement. This includes CONFIG_BOARD_LATE_INIT to call the
board specific serdes init code.

With these features enabled, the serdes and PCIe driver including the
Intel E1000 driver can be tested on the Octeon EBB7304.

Signed-off-by: Stefan Roese <sr@denx.de>