bnxt_en: Add ethtool -N support for ether filters.

bnxt_en: Add ethtool -N support for ether filters.

Add ETHTOOL_SRXCLSRLINS and ETHTOOL_SRXCLSRLDEL support for inserting
and deleting L2 ether filter rules.  Destination MAC address and
optional VLAN are supported for each filter entry.  This is currently
only supported on older BCM573XX and BCM574XX chips only.

Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240205223202.25341-3-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>