BoardConfig: remove unused (and incorrect) flag

Change-Id: I1958199076b4e7b5be37f77260c819d814de9c69
m8: Remove unnecessary LTE overlay option

Change-Id: I843991479cf03dd8def745a8f0bd79815fefda2f
Merge remote-tracking branch 'cm/cm-11.0' into kk4.4

Conflicts:
	BoardConfig.mk

Change-Id: Id27713991c55b751d90d082119230901a1a0d833