devlink: Fix dmac_filter trap name, align to its documentation

%s/dest_mac_filter/dmac_filter/g

Fixes: e78ab164 ("devlink: Add DMAC filter generic packet trap")
Signed-off-by: NAya Levin <ayal@nvidia.com>
Reported-by: NIdo Schimmel <idosch@nvidia.com>
Reviewed-by: NTariq Toukan <tariqt@nvidia.com>
Reviewed-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/devlink.h

@@ -1090,7 +1090,7 @@ enum devlink_trap_group_generic_id {
 #define DEVLINK_TRAP_GENERIC_NAME_BLACKHOLE_NEXTHOP \
 	"blackhole_nexthop"
 #define DEVLINK_TRAP_GENERIC_NAME_DMAC_FILTER \
-	"dest_mac_filter"
+	"dmac_filter"
 
 #define DEVLINK_TRAP_GROUP_GENERIC_NAME_L2_DROPS \
 	"l2_drops"