repair sysv_write_inode(), switch sysv to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc fs/sysv/dir.c
Simple merge

diff --cc fs/sysv/file.c
Simple merge

diff --cc fs/sysv/inode.c
Simple merge

diff --cc fs/sysv/sysv.h
Simple merge