[][Add debug_level of pr_info in mtk_hnat_dscp_update]

[Description]
Add debug_level of pr_info in mtk_hnat_dscp_update.

[Release-log]
N/A

Change-Id: I722ecbb0dee863cf6f843862b0b4b423278c8b23
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5709313
1 file changed