Seperate BoardConfig.mk and product makefiles.

Bug: 26522963

Also move all init.rc files in device folder.

Signed-off-by: leozhang <leozwang@google.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

Change-Id: I730cacafd65ed86307c9ce6cc8e40d6716595f38
6 files changed