msm: mpq8092: Enable the memory hole

mpq8092 has a hole in the memory map.
1. Select the appropriate Kconfig options for this
hole to be used effectively.
2. parse the dt for memory-hole node and carveout
memory accordingly.

Change-Id: I19dafd90309d769369a0db107abdb444dc3b0007
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>