prebuilt/wifi: update ath6kl to CMTP v4.5

v4.4.1 disabled "scheduled-scan"
v4.5   reworks how WOW is handled
see https://github.com/TouchpadCM/compat-wireless-3.5-rc3-1-sn

Change-Id: If4fe4ec3c134d93c3e684e2e46fe414cf76b7ada
Merge "prebuilt/wifi: update ath6kl to CMTP v4.5" into jellybean