hook-functions: Add f2fs as base in auto_add_modules

For people wanting to change their filesystem to F2FS or for embedded
devices with eMMC or sdcard, add the f2fs module and its dependency as
base module. Moreover, this adds "crc32" as hidden dependency module for
f2fs.

hook-functions

@@ -544,7 +544,7 @@ auto_add_modules()
 	for arg in "$@" ; do
 		case "$arg" in
 		base)
-			modules="$modules btrfs ext2 ext3 ext4 ext4dev "
+			modules="$modules btrfs ext2 ext3 ext4 ext4dev f2fs"
 			modules="$modules isofs jfs reiserfs udf xfs"
 			modules="$modules nfs nfsv2 nfsv3 nfsv4"
 			modules="$modules af_packet atkbd i8042 psmouse"
@@ -686,6 +686,9 @@ hidden_dep_add_modules()
 			btrfs)
 				echo crc32c
 				;;
+			f2fs)
+				echo crc32
+				;;
 			mlx4_core)
 				echo mlx4_ib
 				;;