at_wini: more general system to allow devices that behave like ata controllers.

(let silicon image sata controller that is pci class 1, subclass 0x80,
but works as a sata controller, work as such.)

etc/system.conf

@@ -153,6 +153,7 @@ service at_wini
 	;
 	pci class	
 		1/1		# Mass storage / IDE
+		1/80		# Mass storage / Other (80 hex)
 		1/4		# Mass storage / RAID
 	;
 };