drm/amdgpu: save VCN instances init info before jpeg init

JPEG init header will overwirte vcn init header info which will loss
some debug information
Signed-off-by: Lin.Cao <lincao12@amd.com>
Reviewed-by: Jingwen Chen <Jingwen.Chen2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/jpeg_v4_0.c

@@ -431,6 +431,10 @@ static int jpeg_v4_0_start_sriov(struct amdgpu_device *adev)
 	end.cmd_header.command_type =
 		MMSCH_COMMAND__END;
 
+	size = sizeof(struct mmsch_v4_0_init_header);
+	table_loc = (uint32_t *)table->cpu_addr;
+	memcpy(&header, (void *)table_loc, size);
+
 	header.version = MMSCH_VERSION;
 	header.total_size = RREG32_SOC15(VCN, 0, regMMSCH_VF_CTX_SIZE);