fs/vfs and fs/inode: Trivial typo fixes gleaned from the fileopen branch.

fs/inode/fs_filedetach.c

@@ -152,7 +152,7 @@ int file_detach(int fd, FAR struct file *filep)
   filep->f_inode   = parent->f_inode;
   filep->f_priv    = parent->f_priv;
 
-  /* Release the file descriptore *without* calling the drive close method
+  /* Release the file descriptor *without* calling the driver close method
    * and without decrementing the inode reference count.  That will be done
    * in file_close_detached().
    */

fs/vfs/fs_open.c

@@ -89,7 +89,7 @@ int inode_checkflags(FAR struct inode *inode, int oflags)
  *
  ****************************************************************************/
 
-int open(const char *path, int oflags, ...)
+int open(FAR const char *path, int oflags, ...)
 {
   struct inode_search_s desc;
   FAR struct file *filep;