[source] kernel: add missing config option for kernel 4.9

[LEDE Commits]

hauke pushed a commit to source.git, branch master:
https://git.lede-project.org/d61a799528244901b3b6c801e2b53c75ea1e4843

commit d61a799528244901b3b6c801e2b53c75ea1e4843
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Sat Feb 11 19:16:23 2017 +0100

    kernel: add missing config option for kernel 4.9
    
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/generic/config-4.9 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/generic/config-4.9 b/target/linux/generic/config-4.9
index 7248360..b762e3b 100644
--- a/target/linux/generic/config-4.9
+++ b/target/linux/generic/config-4.9
@@ -1987,6 +1987,7 @@ CONFIG_KERNEL_MODE_NEON=y
 CONFIG_KERNEL_XZ=y
 CONFIG_KERNFS=y
 # CONFIG_KEXEC is not set
+# CONFIG_KEY_DH_OPERATIONS is not set
 # CONFIG_KEYBOARD_ADC is not set
 # CONFIG_KEYBOARD_ADP5588 is not set
 # CONFIG_KEYBOARD_ADP5589 is not set