nvk: Only support Vulkan 1.4 on Turing+

It needs hostImageCopy which we don't have working pre-Turing yet.

Fixes: 173171f73e ("nvk: Advertise Vulkan 1.4")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32443>

src/nouveau/vulkan/nvk_physical_device.c

@@ -85,6 +85,12 @@ nvk_get_vk_version(const struct nv_device_info *info)
    return VK_MAKE_VERSION(1, 1, VK_HEADER_VERSION);
 #endif
 
+   /* Vulkan 1.4 requires hostImageCopy which is currently only supported on
+    * Turing+.
+    */
+   if (info->cls_eng3d < TURING_A)
+      return VK_MAKE_VERSION(1, 3, VK_HEADER_VERSION);
+
    return VK_MAKE_VERSION(1, 4, VK_HEADER_VERSION);
 }