ath10k: Don't call SCM interface for statically mapped msa region

For some targets ex: QCS404, SCM permissions for MSA region is
statically configured in TrustZone fw. Add SCM call disable option
for such targets to avoid duplicate permissions.

Change-Id: Id0d75721bfd31bfbcc146d8251764e4841c22d6c
Signed-off-by: Govind Singh <govinds@codeaurora.org>