recognise new southbridge and new pentium IV xeon cpu in the kernel.

Reference: /n/sources/patch/applied/9-p4
Date: Sat Oct 16 06:12:20 CES 2004

--- /sys/src/9/pc/pci.c	Sat Oct 16 06:12:20 2004
+++ /sys/src/9/pc/pci.c	Sat Oct 16 06:12:20 2004
@@ -634,6 +634,7 @@
 	{ 0x8086, 0x2420, pIIxget, pIIxset },	// Intel 82801AB
 	{ 0x8086, 0x2440, pIIxget, pIIxset },	// Intel 82801BA
 	{ 0x8086, 0x244c, pIIxget, pIIxset },	// Intel 82801BAM
+	{ 0x8086, 0x24d0, pIIxget, pIIxset },	// Intel ICH5R, as found in 875P chipset
 	{ 0x1106, 0x0586, viaget, viaset },	// Viatech 82C586
 	{ 0x1106, 0x0596, viaget, viaset },	// Viatech 82C596
 	{ 0x1106, 0x0686, viaget, viaset },	// Viatech 82C686
--- /sys/src/9/pc/devarch.c	Sat Oct 16 06:12:20 2004
+++ /sys/src/9/pc/devarch.c	Sat Oct 16 06:12:20 2004
@@ -558,6 +558,7 @@
 	{ 6,	8,	16,	"PentiumIII/Xeon", },
 	{ 6,	0xB,	16,	"PentiumIII/Xeon", },
 	{ 0xF,	1,	16,	"P4", },	/* P4 */
+	{ 0xF,	2,	16,	"PentiumIV/Xeon", },
 
 	{ 3,	-1,	32,	"386", },	/* family defaults */
 	{ 4,	-1,	22,	"486", },