Revert "wl18xx: send EAPOL frames with TID 7"

This reverts commit 79fd0dbf17215da7b4e6e8d943ddab7cc4b6d6a5.
wlcore: send EAPOL frames with voice priority

Send EAPOL frames with voice priority by setting TX_HW_ATTR_EAPOL_FRAME
new bit in tx attribute. Sending EAPOL with voice priority fixes
re-key timeout during heavy traffic issue.

Signed-off-by: Igal Chernobelsky <igalc@ti.com>