net: tg3: reject unsupported coalescing params

Set ethtool_ops->supported_coalesce_params to let
the core reject unsupported coalescing parameters.

This driver did not previously reject unsupported parameters.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/tg3.c

@@ -14153,6 +14153,11 @@ static int tg3_get_eee(struct net_device *dev, struct ethtool_eee *edata)
 }
 
 static const struct ethtool_ops tg3_ethtool_ops = {
+	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
+				     ETHTOOL_COALESCE_MAX_FRAMES |
+				     ETHTOOL_COALESCE_USECS_IRQ |
+				     ETHTOOL_COALESCE_MAX_FRAMES_IRQ |
+				     ETHTOOL_COALESCE_STATS_BLOCK_USECS,
 	.get_drvinfo		= tg3_get_drvinfo,
 	.get_regs_len		= tg3_get_regs_len,
 	.get_regs		= tg3_get_regs,