vega performance boost tweaks

Change-Id: I9e87664faf43f7480cdf24f63f1dc1e0ddc168a4
some basic build  cleanup

Change-Id: Iaa377981890d04a36503deaa3006daaa29e63e66
AR6000 driver and make

Change-Id: I3999056342f761f174ec4590867b4533b60b6300