driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IALOAP
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Fixes several bugs for hns:
libhns: Fix overwritten SL in DSCP mode
libhns: Support returning the final value of SL configuration
libhns: Fix memory leakage when DCA is enabled
libhns: Fix the exception branch of wr_start() is not locked
Signed-off-by: Xinghai Cen <cenxinghai@h-partners.com>
