bcachefs: Introduce bch2_dirent_get_name

A nice cleanup that avoids a bunch of open-coding name/string usage
around dirent usage.

Will be used by casefolding impl in future commits.

Signed-off-by: Joshua Ashton <joshua@froggi.es>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
3 files changed