Omni bringup

Change-Id: Ib9c990fc06af529feb58d8cc90730e7f64931e84
Use the generic defconfig

Change-Id: I5a278f4e0c6501c36bf545125f4645bf883c9244
Misc makefile cleanups

Change-Id: Ibe231f8b4f84ff7872df5a1d8d85e7db62a30fa4