more bdev_nr_sectors / bdev_nr_bytes conversions

[Christoph Hellwig <hch@xxxxxx>]

Hi Jens,

these somehow slipped into a different branch, so here is another
small batch.

Diffstat:
 ioctl.c          |   20 ++++++++------------
 partitions/efi.c |    2 +-
 partitions/ibm.c |   19 ++++++++++---------
 3 files changed, 19 insertions(+), 22 deletions(-)