Revert "Avoid irrelevant "offset extend ends" error message for chrdev"

Revert "Avoid irrelevant "offset extend ends" error message for chrdev"

This reverts commit 0f34169ac64f009b193bed1c8fb6692844bf99c2.

> Commit 0f34169a broke it, moving a check from a non-character
> device path up a level to where it now triggers on a character
> device (for which the size is left set to -1ULL).
>
> This gets it working again:
>         git revert 0f34169a
>         make
>
> Tomohiro, could you help prepare a better fix?

Sorry, I'll just revert it at the moment.

Signed-off-by: Jens Axboe <axboe@kernel.dk>