ARM: dts: msm: Remove fb memory allocation

Remove frame buffer contiguous memory allocation
at boot time as this memory is no longer being used.

Change-Id: Icdaa261ea06af7591d5d6348988902dbf932318d
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>

Conflicts:
	arch/arm/boot/dts/apq8084.dtsi
	arch/arm/boot/dts/msm8974.dtsi
	arch/arm/boot/dts/msmsamarium.dtsi