drivers/thermal/thermal_sys.c: fix 'key f70f4b50 not in .data' in thermal_sys

Initialize sysfs attributes before device_create_file call.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=15548



Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Greg KH <gregkh@suse.de>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>