Refactored debug() and log() in CDev

These functions used vprintf which is not available on all platforms.
They also do not enable line and file debug output.

Changed to macros that preserve the output format.  Uses new macro that
can be used to implement per object, runtime selectable logging

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

src/drivers/device/device_nuttx.h

@@ -54,6 +54,9 @@
 
 #include <nuttx/fs/fs.h>
 
+#define DEVICE_LOG(FMT, ...) PX4_LOG_NAMED(_name, FMT, ##__VA_ARGS__)
+#define DEVICE_DEBUG(FMT, ...) PX4_LOG_NAMED_COND(_name, _debug_enabled, FMT, ##__VA_ARGS__)
+
 /**
  * Namespace encapsulating all device framework classes, functions and data.
  */
@@ -197,22 +200,6 @@ protected:
 		sem_post(&_lock);
 	}
 
-	/**
-	 * Log a message.
-	 *
-	 * The message is prefixed with the driver name, and followed
-	 * by a newline.
-	 */
-	void		log(const char *fmt, ...);
-
-	/**
-	 * Print a debug message.
-	 *
-	 * The message is prefixed with the driver name, and followed
-	 * by a newline.
-	 */
-	void		debug(const char *fmt, ...);
-
 private:
 	int		_irq;
 	bool		_irq_attached;