sysdev: Add sysdev_create/remove_files

Allow to create/remove arrays of sysdev attributes

Just wrappers around sysfs_create/move_files

Will be used later to clean up some drivers.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>