fs/Kconfig: move 9p out

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
diff --git a/fs/Kconfig b/fs/Kconfig
index 0563f9f..93945dd 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -270,17 +270,7 @@
 source "fs/ncpfs/Kconfig"
 source "fs/coda/Kconfig"
 source "fs/afs/Kconfig"
-
-config 9P_FS
-	tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
-	depends on INET && NET_9P && EXPERIMENTAL
-	help
-	  If you say Y here, you will get experimental support for
-	  Plan 9 resource sharing via the 9P2000 protocol.
-
-	  See <http://v9fs.sf.net> for more information.
-
-	  If unsure, say N.
+source "fs/9p/Kconfig"
 
 endif # NETWORK_FILESYSTEMS