Fix the driver to match the information in datasheet 1.0. AMD 
SI interface is marked as reserved, computing formula for 5VDD
and 5VSB is updated.
Signed-off-by: NGong Jun <jgong@winbond.com>
Signed-off-by: NRudolf Marek <r.marek@assembler.cz>
Signed-off-by: NJean Delvare <khali@linux-fr.org>