bna: Consolidated HW Registers for Supported HWs

Change details:
 - Introducing new file bfi_reg.h for consolidating all supported hardware
   registers. This file completely replaces bfi_ctreg.h.
 - Updated ioc code as per register definition change.

Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>