ARM: dts: msm: Support continuous splash for apq8084

Update APQ8084 target dtsi files to support the continuous
splash screen. It also reserves memory for the framebuffer
in the HLOS partition that would be used to display the
splash screen in the bootloader as well as the initial
stages of the kernel bootup.

Change-Id: I0fc2134c66b287093f3165ccd18a894214e8ae6d
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>