ARM: dts: msm: Update device tree with memory map information for 8974 pro

Update the device tree in order to be aligned with the latest memory
map. As the venus, adsp and wconnect images are relocatable, reclaim
the memory that was previously occupied by non relocatable images of
these subsystems.

Change-Id: I553e57412ef6868eac97874f3300982a029fe971
Signed-off-by: Neeti Desai <neetid@codeaurora.org>