block: Convert bio_for_each_segment() to bvec_iter

More prep work for immutable biovecs - with immutable bvecs drivers
won't be able to use the biovec directly, they'll need to use helpers
that take into account bio->bi_iter.bi_bvec_done.

This updates callers for the new usage without changing the
implementation yet.

Signed-off-by: Kent Overstreet <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: "Ed L. Cashin" <[email protected]>
Cc: Nick Piggin <[email protected]>
Cc: Lars Ellenberg <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Paul Clements <[email protected]>
Cc: Jim Paris <[email protected]>
Cc: Geoff Levand <[email protected]>
Cc: Yehuda Sadeh <[email protected]>
Cc: Sage Weil <[email protected]>
Cc: Alex Elder <[email protected]>
Cc: [email protected]
Cc: Joshua Morris <[email protected]>
Cc: Philip Kelleher <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Neil Brown <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: [email protected]
Cc: Nagalakshmi Nandigama <[email protected]>
Cc: Sreekanth Reddy <[email protected]>
Cc: [email protected]
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Herton Ronaldo Krzesinski <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Guo Chao <[email protected]>
Cc: Asai Thambi S P <[email protected]>
Cc: Selvan Mani <[email protected]>
Cc: Sam Bradshaw <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Keith Busch <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Quoc-Son Anh <[email protected]>
Cc: Sebastian Ott <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Jerome Marchand <[email protected]>
Cc: Seth Jennings <[email protected]>
Cc: "Martin K. Petersen" <[email protected]>
Cc: Mike Snitzer <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: "Darrick J. Wong" <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Acked-by: Geoff Levand <[email protected]>

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