ethdev: fix cast for C++ compatibility

[ upstream commit 5ed2a2d4fdb696727b614f881f263851fad8832c ]

C++ does not allow implicit conversion to/from void*,
so we need an explicit cast to allow the driver SDK header
to be included from C++ code.

Fixes: e489007 ("ethdev: add generic create/destroy ethdev APIs")

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

lib/librte_ethdev/rte_ethdev_pci.h

@@ -49,8 +49,9 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
 }
 
 static inline int
-eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device) {
-	struct rte_pci_device *pci_dev = bus_device;
+eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device)
+{
+	struct rte_pci_device *pci_dev = (struct rte_pci_device *)bus_device;
 
 	if (!pci_dev)
 		return -ENODEV;