xfree86: Free devlist returned by xf86MatchDevice

xf86MatchDevice returns a dynamically allocated list of GDevPtr-s,
free this when we're done with it.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

hw/xfree86/common/xf86platformBus.c

@@ -479,6 +479,8 @@ xf86platformProbeDev(DriverPtr drvp)
                                         isGPUDevice(devList[i]) ? PLATFORM_PROBE_GPU_SCREEN : 0);
     }
 
+    free(devList);
+
     return foundScreen;
 }
 
@@ -505,6 +507,8 @@ xf86platformAddGPUDevices(DriverPtr drvp)
         }
     }
 
+    free(devList);
+
     return foundScreen;
 }