Revert "endeavoru: Add wl12xx firmware and adapt Wi-Fi calibration script"

Commit was based on the wrong assumption that the TI firmware is in the
hardware/ti/wlan repository. But that is not the case.

This reverts commit f4d15474c1ba2c5144d0296f5271b2e13bfcb80a.

Change-Id: I41293ede44e54bd9b638db4858893be97756b303
endeavoru: Support HBOOT 1.73.0000

Change-Id: I0ce7a32db83138aa814a4bcc71c091d023ce658a