exfat: clean-up Kconfig

Clean-up convoluted Kconfig and set sensible defaults.

 - Disable by default, following mainline style.
 - Make CONFIG_EXFAT_DELAYED_META_DIRTY a default mount option instead.
   Users must pass "nodelayed_meta" in order to disable this.
 - Always compile CONFIG_EXFAT_SUPPORT_DIR_SYNC.
   Users had to use "dirsync" to opt-in anyways.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

Kconfig

@@ -1,108 +1,74 @@
 config EXFAT_FS
-	tristate
-	default y
+	tristate "exFAT fs support"
 	select NLS
 	select NLS_UTF8
 	select NLS_CODEPAGE_437
 	select NLS_ISO8859_1
 	help
 	  If you want to use the exFAT file system, then you must say Y or M
-	  here to inlucde exFAT support.
-	  exFAT is unified FAT-based file system which supports not only fat12/
-	  16/32 with vfat but also exfat. exFAT supports winnt short-name rule.
+	  here to inlucde exFAT support. exFAT supports winnt short-name rule.
 	  (winnt: emulate the Windows NT rule for display/create.)
 
 	  To compile this as a module, choose M here: the module will be called
-	  exfat_core and exfat_fs.
-
-config EXFAT_DELAYED_META_DIRTY
-	bool "Enable delayed metadata dirty"
-	default y
-	depends on EXFAT_FS
-	help
-	  If you enable this feature, metadata(FAT/Directory entry) is updated
-	  by flush thread.
-
-config EXFAT_SUPPORT_DIR_SYNC
-	bool "Enable supporting dir sync"
-	default n
-	depends on EXFAT_FS
-	help
-	  If you enable this feature, the modification for directory operation
-	  is written to a storage at once.
+	  exfat.
 
+if EXFAT_FS
 config EXFAT_DEFAULT_CODEPAGE
 	int "Default codepage for exFAT"
 	default 437
-	depends on EXFAT_FS
 	help
 	  This option should be set to the codepage of your exFAT filesystems.
 
 config EXFAT_DEFAULT_IOCHARSET
 	string "Default iocharset for exFAT"
 	default "utf8"
-	depends on EXFAT_FS
 	help
 	  Set this to the default input/output character set you'd
 	  like exFAT to use. It should probably match the character set
 	  that most of your exFAT filesystems use, and can be overridden
 	  with the "iocharset" mount option for exFAT filesystems.
 
-config EXFAT_CHECK_RO_ATTR
-	bool "Check read-only attribute"
-	default n
-	depends on EXFAT_FS
-
 config EXFAT_ALIGNED_MPAGE_WRITE
 	bool "Enable supporting aligned mpage_write"
 	default y
-	depends on EXFAT_FS
 
 config EXFAT_VIRTUAL_XATTR
 	bool "Virtual xattr support for exFAT"
 	default y
-	depends on EXFAT_FS
 	help
 	  To support virtual xattr.
 
 config EXFAT_VIRTUAL_XATTR_SELINUX_LABEL
 	string "Default string for SELinux label"
 	default "u:object_r:sdcard_external:s0"
-	depends on EXFAT_FS && EXFAT_VIRTUAL_XATTR
+	depends on EXFAT_VIRTUAL_XATTR
 	help
 	  Set this to the default string for SELinux label.
 
-config EXFAT_SUPPORT_STLOG
-	bool "Enable storage log"
-	default y
-	depends on EXFAT_FS && PROC_STLOG
-
 config EXFAT_DEBUG
 	bool "enable debug features"
-	depends on EXFAT_FS
-	default y
+
+if EXFAT_DEBUG
 
 config EXFAT_DBG_IOCTL
 	bool "enable debug-ioctl features"
-	depends on EXFAT_FS && EXFAT_DEBUG
-	default n
+	depends on EXFAT_DEBUG
 
 config EXFAT_DBG_MSG
 	bool "enable debug messages"
-	depends on EXFAT_FS && EXFAT_DEBUG
-	default y
+	depends on EXFAT_DEBUG
 
 config EXFAT_DBG_BUGON
 	bool "enable strict BUG_ON() for debugging"
-	depends on EXFAT_FS && EXFAT_DEBUG
-	default n
+	depends on EXFAT_DEBUG
 
 config EXFAT_DBG_WARNON
 	bool "enable strict WARN_ON() for debugging"
-	depends on EXFAT_FS && EXFAT_DEBUG
-	default n
+	depends on EXFAT_DEBUG
+
+endif # if EXFAT_DEBUG
 
 config EXFAT_STATISTICS
 	bool "enable statistics for bigdata"
-	depends on EXFAT_FS
-	default y
+
+endif # if EXFAT_FS