arch/arm/mach-msm/cpufreq.c: reduce dmesg log spam

Signed-off-by: Paul Reioux <reioux@gmail.com>
 iov_iter: move into its own file

This moves the iov_iter functions in to their own file.  We're going to
be working on them in upcoming patches.  They become sufficiently large,
and remain self-contained, to justify seperating them from the rest of
the huge mm/filemap.c.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Zach Brown <zab@zabbo.net>
iov_iter add and update it
Revert now
Revert "Revert now"

This reverts commit 09a1d9db10afa12f5712416bd87bc928f69c570c.