clean up utimes and use path based utimes in initrams

[Christoph Hellwig]

Hi Al and Linus,

here is the requested series to add a vfs_utimes and use that in
initramfs, plus assorted cleanups that makes this easier.

 fs/utimes.c        |  107 ++++++++++++++++++++++++++++-------------------------
 include/linux/fs.h |    1 
 init/initramfs.c   |   11 +++--
 3 files changed, 65 insertions(+), 54 deletions(-)