ARM: dts: msm: Add memory map for sdxprairie CPE

Update the reserved-mem regions to correctly reflect the sdxprairie CPE
V1 memory map.

Change-Id: I8c2feb2e179d20ef3a26c5700c95aecbf2e7cea1
Signed-off-by: Liam Mark <lmark@codeaurora.org>