PCIe setup routines

[Larry Finger]

There are routines in
http://bcm-v4.sipsolutions.net/PCI-E#PCIe_Attach_.28int_state.29 that I
don't think have been implemented.

I still have a question about getting an MMIO address from sprom[x].
That is how the 0x280A address is picked in the code I sent earlier;
however, I don't see any of the other addresses in those routines being
used on my card. I still need to find where that array is filled in
Broadcom's code.

Larry