bfs: don't use WARNING: string when it's just info.

Make the printk() [bfs "printf" macro] seem less severe by changing
"WARNING:" to "NOTE:".

<asm-generic/bug.h> warns us about using WARNING or BUG in a format string
other than in WARN() or BUG() family macros.  bfs/inode.c is doing just
that in a normal printk() call, so change the "WARNING" string to be
"NOTE".

Link: https://lkml.kernel.org/r/20201203212634.17278-1-rdunlap@infradead.org


Reported-by:  <syzbot+3fd34060f26e766536ff@syzkaller.appspotmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: "Tigran A. Aivazian" <aivazian.tigran@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>