msm: camera: smmu: Add support to force all CACHED

Add implementation to allow forcing all camera buffer allocations
to be CACHED and mapped as CACHED while iommu_map. This
is enabled based on DT property. Force this only if
io-coherency is enabled. Validations are added to make sure
a correct combination of "force_cache" and "io-coherency"
properties are mentioned in DT.

CRs-Fixed: 2814719
Change-Id: I0d291ce199f523d67e8cd0105386cc63a671806e
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>

drivers/cam_req_mgr/cam_mem_mgr.h

@@ -70,6 +70,7 @@ struct cam_mem_buf_queue {
  * @dentry: Debugfs entry
  * @alloc_profile_enable: Whether to enable alloc profiling
  * @dbg_buf_idx: debug buffer index to get usecases info
+ * @force_cache_allocs: Force all internal buffer allocations with cache
  */
 struct cam_mem_table {
 	struct mutex m_lock;
@@ -79,6 +80,7 @@ struct cam_mem_table {
 	struct dentry *dentry;
 	bool alloc_profile_enable;
 	size_t dbg_buf_idx;
+	bool force_cache_allocs;
 };
 
 /**