Linux: changed CDev to VDev for virtual device implementation

To avoid confusion when a real device and a virtual device is
being used, changed CDev to VDev for Linux.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/drivers/device/vdev.h

@@ -218,9 +218,9 @@ private:
 };
 
 /**
- * Abstract class for any character device
+ * Abstract class for any virtual character device
  */
-class __EXPORT CDev : public Device
+class __EXPORT VDev : public Device
 {
 public:
 	/**
@@ -229,12 +229,12 @@ public:
 	 * @param name		Driver name
 	 * @param devname	Device node name
 	 */
-	CDev(const char *name, const char *devname);
+	VDev(const char *name, const char *devname);
 
 	/**
 	 * Destructor
 	 */
-	virtual ~CDev();
+	virtual ~VDev();
 
 	virtual int	init();
 
@@ -333,7 +333,7 @@ public:
 	 */
 	virtual int	ioctl(px4_dev_handle_t *handlep, int cmd, unsigned long arg);
 
-	static CDev *getDev(const char *path);
+	static VDev *getDev(const char *path);
 
 protected:
 
@@ -452,14 +452,15 @@ private:
 	int		remove_poll_waiter(px4_pollfd_struct_t *fds);
 
 	/* do not allow copying this class */
-	CDev(const CDev&);
-	CDev operator=(const CDev&);
+	VDev(const VDev&);
+	VDev operator=(const VDev&);
 };
 
+#if 0
 /**
  * Abstract class for character device accessed via PIO
  */
-class __EXPORT PIO : public CDev
+class __EXPORT VPIO : public CDev
 {
 public:
 	/**
@@ -519,6 +520,7 @@ protected:
 private:
 	unsigned long	_base;
 };
+#endif
 
 } // namespace device