clean up based on pawtip's commit:

    a700: make use of t30-common
    Based off initial refactoring by Jacob Bell <fzservers@gmail.com>

    Change-Id: I52105db299761540c2195372cfa148fc54bd21a9

Change-Id: Ifce83044c00ba99b52cf1c1e53a0dd852498d469

maybe we should also use t30-common