openwrt 9p

--- a/target/linux/x86/config-4.4
+++ b/target/linux/x86/config-4.4
@@ -1,5 +1,8 @@
 # CONFIG_60XX_WDT is not set
 # CONFIG_64BIT is not set
+CONFIG_9P_FS=y
+# CONFIG_9P_FS_POSIX_ACL is not set
+# CONFIG_9P_FS_SECURITY is not set
 # CONFIG_ACPI is not set
 # CONFIG_ACQUIRE_WDT is not set
 # CONFIG_ADVANTECH_WDT is not set
@@ -292,6 +295,8 @@ CONFIG_NEED_PER_CPU_KM=y
 CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
 CONFIG_NEED_SG_DMA_LENGTH=y
 # CONFIG_NET5501 is not set
+CONFIG_NET_9P=y
+# CONFIG_NET_9P_DEBUG is not set
 # CONFIG_NET_NS is not set
 CONFIG_NOHIGHMEM=y
 CONFIG_NO_BOOTMEM=y