ARM: dts: msm: Change mem timer base for qcs405

The base of mem timer was incorrect, resulting
in non firing of mem timer hence updating the same.

Change-Id: Ib62a1599abf554f01af63b2f26aa994e12824ac8
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
Signed-off-by: Archit Saxena <archsaxe@codeaurora.org>