This change seems to break expected symbol warnings when building an
external module against a kernel prepared with modules_prepare.
The build used to show
WARNING: Module.symvers is missing.
Modules may not have dependencies or modversions.
You may get many unresolved symbol warnings.
followed by those many unresolved symbol warnings.
6.2-rc2 still shows that warning but the unresolved symbol messages are
now errors and the build fails (at scripts/Makefile.modpost:137). This
seems to happen due to -T getting added.