compat_ioctl: move common block ioctls to compat_blkdev_ioctl

Make compat_blkdev_ioctl and blkdev_ioctl reflect the respective
native versions. This is somewhat more efficient and makes it easier
to keep the two in sync.

Also get rid of the bogus handling for broken_blkgetsize and the
duplicate entry for BLKRASET.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --cc block/Makefile
Simple merge

diff --cc block/compat_ioctl.c
Simple merge

diff --cc block/ioctl.c
Simple merge

diff --cc fs/compat_ioctl.c
Simple merge