drm/amdgpu: add vcn ip dump ptr in vcn global struct

Add pointer to the vcn ip dump in the vcn global structure
to be accessible for all vcn version via global adev.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h

@@ -330,6 +330,9 @@ struct amdgpu_vcn {
 	uint16_t inst_mask;
 	uint8_t	num_inst_per_aid;
 	bool using_unified_queue;
+
+	/* IP reg dump */
+	uint32_t		*ip_dump;
 };
 
 struct amdgpu_fw_shared_rb_ptrs_struct {