mtd: convert to idr_alloc() Convert to the much saner new idr interface. Signed-off-by: Tejun Heo <[email protected]> Tested-by: Ezequiel Garcia <[email protected]> Cc: David Woodhouse <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>