applesmc: Use the address as platform device ID

Let the applesmc device export its address to userspace.  libsensors needs
this to recognize the device and give it a unique ID.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Nicolas Boichat <nicolas@boichat.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>