monarudo: initial bringup for droid dna

Change-Id: Ia6648297b4b309c2a3352cb282e146ff64dbeb04
monarudo: defconfig: update and switch governor to interactive

* be more like m7
* switch default gov to interactive, i assumed incorrectly that init
  would set this for us

Change-Id: I66729aaf552da66e8c2393d78c611f64606a0925