Rename duplicate sysfs_read_file into cpupower_read_sysfs and fix linking.
Signed-off-by: NKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: NThomas Renninger <trenn@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: NShuah Khan (Samsung OSG) <shuah@kernel.org>