Revert "sysdev: fix prototype for memory_sysdev_class show/store functions"

Revert "sysdev: fix prototype for memory_sysdev_class show/store functions"

This reverts commit a072047616d1d3aac94883cb7ac9cd8c6c0c4fc5

It should not have been sent to Linus's tree yet, as it depends
on changes that are queued up in my driver-core for the .34 kernel
merge.

Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: "Zheng, Shaohui" <shaohui.zheng@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>