src/include: Doxygen fixes

- Join doxygen file command with the file description
- Give extended file location so doxygen knows which early_sbmus.h
the file is.  (I don't get this either, but it fixes the warning)

Change-Id: Ia91fb1ac1e9687e1a5a5cb5234696b3c24d4cd24
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/8174
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/include/console/post_codes.h

@@ -20,7 +20,9 @@
 
 /**
  * @file post_codes.h
- *
+ */
+
+/*
  * This aims to be a central point for POST codes used throughout coreboot.
  * All POST codes should be declared here as macros, and post_code() should
  * be used with the macros instead of hardcoded values. This allows us to
@@ -40,6 +42,7 @@
  * without any explanation or effort on part of the maintainers.
  *
  */
+
 #ifndef POST_CODES_H
 #define POST_CODES_H
 

src/include/device/early_smbus.h

@@ -18,7 +18,7 @@
  */
 
 /**
- * @file early_smbus.h
+ * @file device/early_smbus.h
  *
  * This file defines a common API for accessing the SMBus during early
  * initialization. It defines the prototypes for common SMBus functions. The