net: hns3: add support config dscp map to tc

mainline inclusion
from mainline-v6.0-rc3
commit 0ba22bcb
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5QIIF
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ba22bcb222d



----------------------------------------------------------------------

This patch add support config dscp map to tc by implementing ieee_setapp
and ieee_delapp of struct dcbnl_rtnl_ops. Driver will convert mapping
relationship from dscp-prio to dscp-tc.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiantao Xiao <xiaojiantao1@h-partners.com>
Reviewed-by: Jian Shen <shenjian15@huawei.com>
Reviewed-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>