linux: Move to 4.17.18 stable release

This updates the kernel to the latest 4.17 stable release.

Change-Id: I949a4e9a6927acf9e34bc9141406c9870b0d1393
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/recipes-kernel/linux/linux-nuvoton_git.bb b/recipes-kernel/linux/linux-nuvoton_git.bb
index bdd08bc..4c6b035 100644
--- a/recipes-kernel/linux/linux-nuvoton_git.bb
+++ b/recipes-kernel/linux/linux-nuvoton_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-4.17"
-LINUX_VERSION ?= "4.17.14"
+LINUX_VERSION ?= "4.17.18"
 
-SRCREV="4b44547f456a87e8456fe3f4ed2b62ab696249b7"
+SRCREV="80d901318acc389e6e09698a8927bf6eb29da314"
 
 require linux-nuvoton.inc