iwlwifi: mvm: fix WoWLAN RF-kill bug

The RF-kill wakeup trigger flag is set in the wrong command,
which means it won't work. Also fix the comment in the TCP
wakeup trigger code -- the firmware was changed to look at
all the different trigger flags.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>