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audiohda: ich8 support

--- a/sys/src/9/pc/audiohda.c

+++ b/sys/src/9/pc/audiohda.c

@@ -1346,6 +1346,7 @@

 	while(p = pcimatch(p, 0, 0))

 		switch((p->vid << 16) | p->did){

 		case (0x8086 << 16) | 0x27d8:

+		case (0x8086 << 16) | 0x284b:	/* Intel ICH8 */

 		case (0x1002 << 16) | 0x4383:	/* ATI */

 		case (0x1002 << 16) | 0x7919:	/* ATI HDMI */

 			return p;

@@ -1428,9 +1429,13 @@

 	irq = p->intl;

 	tbdf = p->tbdf;

-	/* magic for ATI */

-	if(p->vid == 0x1002)

+	if(p->vid == 0x1002){

+		/* magic for ATI */

 		pcicfgw8(p, 0x42, pcicfgr8(p, 0x42) | 2);

+	} else {

+		/* TCSEL */

+		pcicfgw8(p, 0x44, pcicfgr8(p, 0x44) & 0xf8);

+	}

 	pcisetbme(p);

 	pcisetpms(p, 0);

-- 

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