compat-wireless: use version from original git tree for TI drivers

Change the admin-update.sh script to fetch the version from the
original git tree where the TI drivers were taken from and generate
the version.h files accordingly.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Ido Reis <idor@ti.com>

Conflicts:

	scripts/admin-update.sh