hikey: Enable usb audio support am: 52ebc4660f
am: 0a9dd893e8

* commit '0a9dd893e87d40f3c01bec997f6ec68b23aab5b5':
  hikey: Enable usb audio support

Change-Id: Ie882b057c0af8c5b11e5248dad2815b317f7eee7