d2: use commonized defconfig

Change-Id: I73943ecef48bce13242e4aaeee62b86669c04bdb

Conflicts:
	BoardConfigCommon.mk
d2-common: only build selinux in kernel if we want it

Change-Id: I7df8ebe41321f467a4419cbef65fbd9942d16543

Conflicts:
	BoardConfigCommon.mk