cpukit/libpci/*: Address unused parameter warnings

Add "(void) param;" annotation to address unused parameter warnings.
Found with GCC's warning -Wunused-paramter.

cpukit/libpci/pci_bus.c

@@ -280,6 +280,9 @@ static int pcibus_get_freq(
 	int options,
 	unsigned int *freq_hz)
 {
+	(void) dev;
+	(void) options;
+
 	/* Standard PCI Bus frequency */
 	*freq_hz = 33000000;
 	return 0;
@@ -287,6 +290,8 @@ static int pcibus_get_freq(
 
 int pcibus_get_params(struct drvmgr_dev *dev, struct drvmgr_bus_params *params)
 {
+	(void) dev;
+
 	/* No device prefix */
 	params->dev_prefix = NULL;
 

cpukit/libpci/pci_cfg_auto.c

@@ -493,6 +493,8 @@ static void pci_find_bar(struct pci_dev *dev, int bar)
 
 static int pci_find_res_dev(struct pci_dev *dev, void *unused)
 {
+	(void) unused;
+
 	struct pci_bus *bridge;
 	uint32_t tmp;
 	uint16_t tmp16;
@@ -794,6 +796,8 @@ static void pci_set_bar(struct pci_dev *dev, int residx)
 
 static int pci_set_res_dev(struct pci_dev *dev, void *unused)
 {
+	(void) unused;
+
 	int i, maxbars;
 
 	if (dev->flags & PCI_DEV_BRIDGE)

cpukit/libpci/pci_cfg_print_code.c

@@ -114,6 +114,8 @@ static void pci_cfg_print_device(struct pci_dev *dev, char *prefix)
 
 static int pci_cfg_print_dev(struct pci_dev *dev, void *unused)
 {
+	(void) unused;
+
 	if (dev->flags & PCI_DEV_BRIDGE) {
 		pci_cfg_print_bus((struct pci_bus *)dev);
 	} else {
@@ -160,6 +162,8 @@ int pci_cfg_print_bus(struct pci_bus *bus)
 
 static int pci_cfg_print_forw_dev(struct pci_dev *dev, void *unused)
 {
+	(void) unused;
+
 	if ((dev->flags & PCI_DEV_BRIDGE) == 0) {
 		printf("static struct pci_dev dev_%x_%x_%x;\n",
 			PCI_DEV_EXPAND(dev->busdevfun));

cpukit/libpci/pci_cfg_static.c

@@ -51,6 +51,8 @@
 /* Enumrate one bus if device is a bridge, and all it's subordinate buses */
 static int pci_init_dev(struct pci_dev *dev, void *unused)
 {
+	(void) unused;
+
 	uint32_t tmp;
 	uint16_t tmp16, cmd;
 	struct pci_bus *bridge;