mac80211: fix variable names in TID config methods

Fix all variable names from 'tid' to 'tids' to avoid confusion.
Now this is not TID number, but TID mask.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20200424112905.26770-3-sergey.matyukevich.os@quantenna.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>