Fix building for mako

The makefile assumes the lack of qcom make macros implies the mako,
which is incorrect in our case. Explicitly exclude the mako from
QCOM_BSP for now, as well as any device with TARGET_HAS_OLD_QCOM_BSP
set

Change-Id: I63e2d08f8c49c52e7cef8b7c1fd3e90b1b0307bd
Don't set common deps for prebuilt kernels

Change-Id: I7105f4433f656b813b43d24a21c563f026f203f5