net: hns3: add some link modes for hisilicon device

Add HCLGE_SUPPORT_50G_R1_BIT and HCLGE_SUPPORT_100G_R2_BIT two
capability bits and Corresponding link modes.

Signed-off-by: Hao Chen <chenhao418@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>