Clean up XGI Technology PCI Device IDs

Signed-off-by: Kevin Brace <kevinbrace@bracecomputerlab.com>

src/sis.h

@@ -333,17 +333,18 @@
 #define PCI_CHIP_SIS660			0x6330
 #define PCI_CHIP_SIS340			0x0340
 
-#ifndef PCI_VENDOR_XGI
-#define PCI_VENDOR_XGI		0x18ca
-#endif
 
-#ifndef PCI_CHIP_XGIXG20
-#define PCI_CHIP_XGIXG20	0x0020
-#endif
+/*
+ * XGI Technology PCI Vendor ID
+ */
+#define PCI_VENDOR_XGI		0x18CA
 
-#ifndef PCI_CHIP_XGIXG40
+/*
+ * XGI Technology PCI Device ID
+ */
+#define PCI_CHIP_XGIXG20	0x0020
 #define PCI_CHIP_XGIXG40	0x0040
-#endif
+
 
 /* pSiS->Flags (old series only) */
 #define SYNCDRAM		0x00000001