kunit tests that do not support module build should depend
on KUNIT=y rather than just KUNIT in Kconfig, otherwise
they will trigger compilation errors for "make allmodconfig"
builds.
Fixes: 9fe124bf1b77 ("kunit: allow kunit to be loaded as a module")
Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>