fs/Kconfig: move romfs out

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
diff --git a/fs/Kconfig b/fs/Kconfig
index b348d2e..d8672cc 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -219,24 +219,7 @@
 source "fs/omfs/Kconfig"
 source "fs/hpfs/Kconfig"
 source "fs/qnx4/Kconfig"
-
-config ROMFS_FS
-	tristate "ROM file system support"
-	depends on BLOCK
-	---help---
-	  This is a very small read-only file system mainly intended for
-	  initial ram disks of installation disks, but it could be used for
-	  other read-only media as well.  Read
-	  <file:Documentation/filesystems/romfs.txt> for details.
-
-	  To compile this file system support as a module, choose M here: the
-	  module will be called romfs.  Note that the file system of your
-	  root partition (the one containing the directory /) cannot be a
-	  module.
-
-	  If you don't know whether you need it, then you don't need it:
-	  answer N.
-
+source "fs/romfs/Kconfig"
 
 config SYSV_FS
 	tristate "System V/Xenix/V7/Coherent file system support"
diff --git a/fs/romfs/Kconfig b/fs/romfs/Kconfig
new file mode 100644
index 0000000..1a17020
--- /dev/null
+++ b/fs/romfs/Kconfig
@@ -0,0 +1,16 @@
+config ROMFS_FS
+	tristate "ROM file system support"
+	depends on BLOCK
+	---help---
+	  This is a very small read-only file system mainly intended for
+	  initial ram disks of installation disks, but it could be used for
+	  other read-only media as well.  Read
+	  <file:Documentation/filesystems/romfs.txt> for details.
+
+	  To compile this file system support as a module, choose M here: the
+	  module will be called romfs.  Note that the file system of your
+	  root partition (the one containing the directory /) cannot be a
+	  module.
+
+	  If you don't know whether you need it, then you don't need it:
+	  answer N.