mac80211: ath9k: add tag to upstreamed patch

Add tag to upstreamed patch.

Signed-off-by: Nick Hainke <vincent@systemli.org>

diff --git a/package/kernel/mac80211/patches/ath9k/040-ath9k-support-DT-ieee80211-freq-limit-property-to-li.patch b/package/kernel/mac80211/patches/ath9k/040-v5.16-ath9k-support-DT-ieee80211-freq-limit-property-to-li.patch
similarity index 100%
rename from package/kernel/mac80211/patches/ath9k/040-ath9k-support-DT-ieee80211-freq-limit-property-to-li.patch
rename to package/kernel/mac80211/patches/ath9k/040-v5.16-ath9k-support-DT-ieee80211-freq-limit-property-to-li.patch