dt: bindings: add dt entry flag to skip SCM call for msa region

Add boolean context flag to disable SCM call for statically
mapped msa region.
Signed-off-by: Govind Singh <govinds@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt

@@ -88,6 +88,9 @@ Optional properties:
 		    of the host capability QMI request
 - qcom,xo-cal-data: xo cal offset to be configured in xo trim register.
 
+- qcom,msa-fixed-perm: Boolean context flag to disable SCM call for statically
+		       mapped msa region.
+
 Example (to supply PCI based wifi block details):
 
 In this example, the node is defined as child node of the PCI controller.
@@ -185,4 +188,5 @@ wifi@18000000 {
 		vdd-3.3-ch0-supply = <&vreg_l25a_3p3>;
 		memory-region = <&wifi_msa_mem>;
 		iommus = <&apps_smmu 0x0040 0x1>;
+		qcom,msa-fixed-perm;
 };