intel/dev: Fill in system memory info when using INTEL_DEVID_OVERRIDE

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17828>

src/intel/dev/intel_device_info.c

@@ -1999,6 +1999,7 @@ intel_get_device_info_from_fd(int fd, struct intel_device_info *devinfo)
       /* Provide some sensible values for NO_HW. */
       devinfo->gtt_size =
          devinfo->ver >= 8 ? (1ull << 48) : 2ull * 1024 * 1024 * 1024;
+      compute_system_memory(devinfo, false);
       return true;
    }