ext2: use common file type conversion

Deduplicate the ext2 file type conversion implementation and remove
EXT2_FT_* definitions - file systems that use the same file types as
defined by POSIX do not need to define their own versions and can
use the common helper functions decared in fs_types.h and implemented
in fs_types.c

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/ext2/ext2.h

@@ -603,22 +603,6 @@ struct ext2_dir_entry_2 {
 	char	name[];			/* File name, up to EXT2_NAME_LEN */
 };
 
-/*
- * Ext2 directory file types.  Only the low 3 bits are used.  The
- * other bits are reserved for now.
- */
-enum {
-	EXT2_FT_UNKNOWN		= 0,
-	EXT2_FT_REG_FILE	= 1,
-	EXT2_FT_DIR		= 2,
-	EXT2_FT_CHRDEV		= 3,
-	EXT2_FT_BLKDEV		= 4,
-	EXT2_FT_FIFO		= 5,
-	EXT2_FT_SOCK		= 6,
-	EXT2_FT_SYMLINK		= 7,
-	EXT2_FT_MAX
-};
-
 /*
  * EXT2_DIR_PAD defines the directory entries boundaries
  *