bna: Remove Obsolete File bfi_ctreg.h

Change detail:
 - Remove obsolete file bfi_ctreg.h as we added new file bfi_reg.h
   consolidating HW reg definitions including the ones for new HW.
Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>