arch: blackfin: uapi: be sure of "_UAPI" prefix for all guard macros

For all uapi headers, need use "_UAPI" prefix for its guard macro
(which will be stripped by "scripts/headers_installer.sh").

Also be sure that all files have their guard macros.

Also be sure that all "#endif" are followed with comments, and no '\t'
for guard macro

Signed-off-by: Chen Gang <gang.chen@asianux.com>

arch/blackfin/include/uapi/asm/fcntl.h

@@ -4,8 +4,8 @@
  * Licensed under the GPL-2 or later.
  */
 
-#ifndef _BFIN_FCNTL_H
-#define _BFIN_FCNTL_H
+#ifndef _UAPI_BFIN_FCNTL_H
+#define _UAPI_BFIN_FCNTL_H
 
 #define O_DIRECTORY	 040000	/* must be a directory */
 #define O_NOFOLLOW	0100000	/* don't follow links */
@@ -14,4 +14,4 @@
 
 #include <asm-generic/fcntl.h>
 
-#endif
+#endif /* _UAPI_BFIN_FCNTL_H */