sysfs.h: fix non-kernel-doc comment

Don't use "/**" to begin this comment block since it is not a
kernel-doc comment block.

Also adjust comment line to fit in 80 characters.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/sysfs.h

@@ -91,9 +91,9 @@ struct attribute_group {
 	struct bin_attribute	**bin_attrs;
 };
 
-/**
- * Use these macros to make defining attributes easier. See include/linux/device.h
- * for examples..
+/*
+ * Use these macros to make defining attributes easier.
+ * See include/linux/device.h for examples..
  */
 
 #define SYSFS_PREALLOC 010000