anv: fix minor gen_ioctl(I915_PERF_IOCTL_CONFIG) error handling issue

Found by Coverity.

Fixes: 2001a80d4a ("anv: Implement VK_KHR_performance_query")
Signed-off-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6667>

src/intel/vulkan/anv_batch_chain.c

@@ -1821,7 +1821,7 @@ anv_queue_execbuf_locked(struct anv_queue *queue,
          if (ret < 0) {
             result = anv_device_set_lost(device,
                                          "i915-perf config failed: %s",
-                                         strerror(ret));
+                                         strerror(errno));
          }
       }