huashan: Remove unnecessary LTE overlay option

already defined in android_vendor_cm

http://review.cyanogenmod.org/#/c/66329/

Change-Id: Ie499da055de61072e587f2b8b20acd8c86914141
huashan: cleanup boardconfig

TARGET_ARCH_VARIANT_CPU is now only used in ARMV6. Let's nuke it

Change-Id: Id22caa74a77a993b8253fdcb23fc4ebbc78d62e4
huashan: cleanup overlay that is already defined in vendor_cm

Change-Id: I31d4a7c7155fb1c95067086d1d5654ccd547e1eb