[source] kernel: add missing config symbol

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=08a27b99a2a4306c69c55238bd4fa8c4eef497bd

commit 08a27b99a2a4306c69c55238bd4fa8c4eef497bd
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Thu Aug 11 18:32:51 2016 +0200

    kernel: add missing config symbol
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/kernel/linux/modules/fs.mk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/package/kernel/linux/modules/fs.mk b/package/kernel/linux/modules/fs.mk
index e8e1f80..844a3c9 100644
--- a/package/kernel/linux/modules/fs.mk
+++ b/package/kernel/linux/modules/fs.mk
@@ -33,7 +33,8 @@ define KernelPackage/fs-9p
   KCONFIG:=\
 	CONFIG_9P_FS \
 	CONFIG_9P_FS_POSIX_ACL=n \
-	CONFIG_9P_FS_SECURITY=n
+	CONFIG_9P_FS_SECURITY=n \
+	CONFIG_9P_FSCACHE=n
   FILES:=$(LINUX_DIR)/fs/9p/9p.ko
   AUTOLOAD:=$(call AutoLoad,30,9p)
 endef