arm: mach-msm: board-htc-8974: import m8whl (Sprint) and w8wl (VZW) variant

Change-Id: Ie92eee3c7bfdf8ccc260b07a6691198885d38ab0

Conflicts:
	arch/arm/boot/dts/msm8974pro-ab-pm8941-m8whl-xb.dts
	arch/arm/boot/dts/msm8974pro-ab-pm8941-m8whl-xd.dts
	arch/arm/boot/dts/msm8974pro-ab-pm8941-m8whl-xe.dts
	arch/arm/boot/dts/msm8974pro-ab-pm8941-m8whl-xf.dts
	arch/arm/boot/dts/msm8974pro-ab-pm8941-m8whl.dts
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/Makefile
	arch/arm/mach-msm/Makefile.boot
	arch/arm/mach-msm/board-htc-8974.c
	arch/arm/mach-msm/display/Makefile
Variant derp