bnxt_en: Re-factor bnxt_setup_tc().

bnxt_en: Re-factor bnxt_setup_tc().

Orabug: 24567991

Add a new function bnxt_setup_mq_tc() to handle MQPRIO.  This new function
will be called during ETS setup when we add DCBNL in the next patch.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit c5e3deb8a38453037b89e0b0485d3b031896e8eb)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/net/ethernet/broadcom/bnxt/bnxt.c

Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>