sky2: enable PCI config writes

On some boards, PCI configuration space access is turned off by default.
The 2.6.24 driver doesn't turn it on, and should have.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index c27c7d6..4f41a94 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2791,6 +2791,9 @@
 	sky2_write8(hw, B0_CTST, CS_RST_SET);
 	sky2_write8(hw, B0_CTST, CS_RST_CLR);
 
+	/* allow writes to PCI config */
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
+
 	/* clear PCI errors, if any */
 	pci_read_config_word(pdev, PCI_STATUS, &status);
 	status |= PCI_STATUS_ERROR_BITS;