use variant defconfig for different devices and shared config.

As this commit comes from 3.0.8 kernel the shared defconfig will not be usable for building the kernel.


Conflicts:
	arch/arm/configs/mapphone_1GB_phablet_defconfig
	arch/arm/configs/mapphone_512MB_defconfig
	arch/arm/configs/mapphone_BSE_defconfig
	arch/arm/configs/mapphone_mmi_selinux_defconfig
	arch/arm/configs/mapphone_targa_defconfig

Signed-off-by: dtrail <mnl.manz@gmail.com>
Defconfig updates