Fix some code comments of the Intel PIIX4/PIIX4E/PIIX4M code

Add detailed instructions on how and where to get the datasheet,
its name, and order number.

Corresponding to flashrom svn r70 and coreboot v2 svn r2493.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> 
Acked-by: Stefan Reinauer <stepan@coresystems.de>
1 file changed