f2fs: relocate Kconfig from misc filesystems

The f2fs has been shipped on many smartphone devices during a couple of years.
So, it is worth to relocate Kconfig into main page from misc filesystems for
developers to choose it more easily.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/Kconfig b/fs/Kconfig
index ec35851..011f433 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -32,6 +32,7 @@
 source "fs/ocfs2/Kconfig"
 source "fs/btrfs/Kconfig"
 source "fs/nilfs2/Kconfig"
+source "fs/f2fs/Kconfig"
 
 config FS_DAX
 	bool "Direct Access (DAX) support"
@@ -217,7 +218,6 @@
 source "fs/sysv/Kconfig"
 source "fs/ufs/Kconfig"
 source "fs/exofs/Kconfig"
-source "fs/f2fs/Kconfig"
 
 endif # MISC_FILESYSTEMS