d2-common: set persist.fuse_sdcard=true

We do not have a real internal sd card and the startup scripts
repeatedly refer to this setting, so set it

Change-Id: Ic1c16a5a2c5c3d7a24782bcdf8842db322465371
d2-common: fix ifeq's for apex/express

Change-Id: I09e8d95a6540fde333df48b7620b9ef67cf25b85
BoardConfigCommon.mk: Add Magic ZSL Mode