configfs: make configfs_dirent_exists() static
This patch makes the needlessly global configfs_dirent_exists() static. Signed-off-by: NAdrian Bunk <bunk@stusta.de> Signed-off-by: NJoel Becker <joel.becker@oracle.com> Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
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