defconfig: msm: Disable DEBUG_OBJECTS for SDM670 & SDM845

DEBUG_OBJECTS have been more trouble maker than helping
hand in debugging. For ex,

 1) They gets detected in KMEMLEAK because these debug
    objects are not pointed by anyone. They are accessed
    by list structures contained within them.
 2) We often see list corruptions inside debug objects.
 3) The use-cases of debug objects are anyway covered
    by other generic and more sophisticated debug features
    like KASAN, SLUB_DEBUG etc.

So, remove DEBUG_OBJECTS for the good.

Change-Id: I01401a7cd394e621f9709537899a0e990dc6a418
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>