radv: for external memory imports close the fd on import success

If we get an fd, we need to close it before returning.

Fixes CTS test dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.import_multiple_times

Fixes: b70829708a (radv: Implement VK_KHR_external_memory)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_device.c

@@ -2253,8 +2253,10 @@ VkResult radv_AllocateMemory(
 		if (!mem->bo) {
 			result = VK_ERROR_INVALID_EXTERNAL_HANDLE_KHR;
 			goto fail;
-		} else
+		} else {
+			close(import_info->fd);
 			goto out_success;
+		}
 	}
 
 	uint64_t alloc_size = align_u64(pAllocateInfo->allocationSize, 4096);