rocr: add const version of driver() method to Agent class

This change adds a const-qualified version of the driver() method to the Agent
class, allowing const Agent objects to access their associated driver without
modifying the object's state.

Signed-off-by: Honglei Huang <Honglei1.Huang@amd.com>


[ROCm/ROCR-Runtime commit: 9c18618847]

projects/rocr-runtime/runtime/hsa-runtime/core/inc/agent.h

@@ -313,7 +313,8 @@ class Agent : public Checked<0xF6BC25EB17E6F917> {
   __forceinline uint32_t node_id() const { return node_id_; }
 
   // @brief Returns the driver associated with this agent.
-  __forceinline Driver& driver() const { return *driver_; }
+  __forceinline Driver& driver() { return *driver_; }
+  __forceinline const Driver& driver() const { return *driver_; }
 
   // @brief Getter for profiling_enabled_.
   __forceinline bool profiling_enabled() const { return profiling_enabled_; }