bna: PLL Init Fix and Add Stats Attributes

Change details:
 - Fix to release soft reset in PLL init for HW
 - Added stats attributes and new bfi msg class
 - Removed some unused code and typo fixes

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