Board enable for Shuttle FN25 (SN25P).

Shuttle SFF PC is SN25P, board FN25, AMD socket 939 with an nForce4
chipset.

Config register 0x92 on the ISA bridge needs to be cleared for TBL#
to be raised. No information about individual bits of this register
is currently available.

Signed-off-by: Luc Verhaegen <libv@skynet.be>

Index: board_enable.c
===================================================================
--- board_enable.c	(revision 727)
+++ board_enable.c	(working copy)
@@ -956,6 +956,26 @@
 }
 
 /**
+ * Suited for Shuttle FN25 (SN25P): AMD S939 + Nvidia CK804 (nForce4).
+ */
+static int board_shuttle_fn25(const char *name)
+{
+	struct pci_dev *dev;
+
+	dev = pci_dev_find(0x10DE, 0x0050);	/* NVIDIA CK804 ISA Bridge. */
+	if (!dev) {
+		fprintf(stderr,
+			"\nERROR: NVIDIA nForce4 ISA bridge not found.\n");
+		return -1;
+	}
+
+	/* one of those bits seems to be connected to TBL#, but -ENOINFO. */
+	pci_write_byte(dev, 0x92, 0);
+
+	return 0;
+}
+
+/**
  * We use 2 sets of IDs here, you're free to choose which is which. This
  * is to provide a very high degree of certainty when matching a board on
  * the basis of subsystem/card IDs. As not every vendor handles
@@ -1018,6 +1038,7 @@
 	{0x8086, 0x2658, 0x1462, 0x7046,  0x1106, 0x3044, 0x1462, 0x046d, NULL,         NULL,          "MSI",         "MS-7046",            ich6_gpio19_raise},
 	{0x10de, 0x005e,      0,      0,       0,      0,      0,      0, "msi",        "k8n-neo3",    "MSI",         "MS-7135 (K8N Neo3)", w83627thf_gpio4_4_raise_4e},
 	{0x1106, 0x3104, 0x1297, 0xa238,  0x1106, 0x3059, 0x1297, 0xc063, NULL,         NULL,          "Shuttle",     "AK38N",              it8705f_write_enable_2e},
+	{0x10DE, 0x0050, 0x1297, 0x5036,  0x1412, 0x1724, 0x1297, 0x5036, NULL,         NULL,          "Shuttle",     "FN25",               board_shuttle_fn25},
 	{0x1106, 0x3038, 0x0925, 0x1234,  0x1106, 0x3058, 0x15DD, 0x7609, NULL,         NULL,          "Soyo",        "SY-7VCA",            board_soyo_sy_7vca},
 	{0x8086, 0x1076, 0x8086, 0x1176,  0x1106, 0x3059, 0x10f1, 0x2498, NULL,         NULL,          "Tyan",        "S2498 (Tomcat K7M)", board_asus_a7v8x_mx},
 	{0x1106, 0x0314, 0x1106, 0xaa08,  0x1106, 0x3227, 0x1106, 0xAA08, NULL,         NULL,          "VIA",         "EPIA-CN",            board_via_epia_sp},