ARM: dts: msm: Update device tree with memory map information

Split the memory hole, as the size of the modem image has
been updating resulting in more HLOS memory.

The modem image is no longer relocatable and thus the pil heap
for the same is no longer present

Change-Id: I564a7ad19e409d8f87a33bc1b3389983f762a15b
Signed-off-by: Neeti Desai <neetid@codeaurora.org>