overlay: mms: increase mms image size

Change-Id: Ifd3767806144f1aa0d261851c2078dc0cc16fe2f
overlay: mms: add useragent

* apparently this is required in this overlay, i guess it would make
  too much sense for it to use the default when not overlayed like
  every other overlay...

Change-Id: Icdfd5e73070d62d42cd4fafbc2e18757453647fa
m8: High-res audio support

Change-Id: I0bea6a9133fc67b728b488056495aeaf496fa2a4
init: interactive changes

* disable io_is_busy
* configure target up/down loads

Change-Id: Ice2e1b796395b4fdc79899ae4c1199820244b2c5