msm: camera: memmgr: Add interface to support cpu access operation

Add ioctl interfaces to support dma begin and end cpu access
operations for camera buffers.

CRs-Fixed: 3197463
Change-Id: Ibeb31e8f425489abfdd47df6f92271ac40ace407
Signed-off-by: Pavan Kumar Chilamkurthi <quic_pchilamk@quicinc.com>

drivers/cam_req_mgr/cam_mem_mgr.h

@@ -168,6 +168,15 @@ int cam_mem_mgr_map(struct cam_mem_mgr_map_cmd_v2 *cmd);
  */
 int cam_mem_mgr_cache_ops(struct cam_mem_cache_ops_cmd *cmd);
 
+/**
+ * @brief: Perform cpu access ops on the buffer
+ *
+ * @cmd:   CPU access ops information
+ *
+ * @return Status of operation. Negative in case of error. Zero otherwise.
+ */
+int cam_mem_mgr_cpu_access_op(struct cam_mem_cpu_access_op *cmd);
+
 /**
  * @brief: Initializes the memory manager
  *