mem/lib: make sys_file use as file instead of path

Original design was to pass full path to set/get_sys_tune() but it seems
like we'd better keep sys_file paramter filenames only.

Reported-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Caspar Zhang <caspar@casparzhang.com>
1 file changed