Revert "ARM: dts: msm: Allow adsp heap to share the secure memory CMA pool"

This reverts commit e454457b.
We cannot share the memory between MM and ADSP heaps because on boot up
a TZ call is made to assign ADSP and HLOS VMID to the entire region
required by ADSP. Because of this when memory is allocated by MM heap
and TZ is asked to lock the memory using AMT and assign CP VMID to
it, it fails.

Change-Id: I8153cb7cb43b1b6ccdf1150882c8c285db07da8f
Signed-off-by: Shalaj Jain <shalajj@codeaurora.org>