arm/dt: msm8974:Change the address for Trustzone buffer log

The current address for TrustZone log driver is incorrect. The
TrustZone buffer has to be moved to a location on DDR since the
IMEM is not preserved over watch dog.

Change-Id: I37573d473d02b839e29479f5e086865234f3d8ab
CRs-fixed: 398964
Signed-off-by: Ramesh Masavarapu <rameshm@codeaurora.org>