linux: Move to 4.17.18 stable release

This updates the kernel to the latest 4.17 stable release.

Change-Id: I9d900ac280830ca0458f9af6e411a980cd5f2525
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/recipes-kernel/linux/linux-aspeed_git.bb b/recipes-kernel/linux/linux-aspeed_git.bb
index daa998c..d719ac7 100644
--- a/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-4.17"
-LINUX_VERSION ?= "4.17.14"
+LINUX_VERSION ?= "4.17.18"
 
-SRCREV="c71662c749dc66a542e717dbd51fefab995c9455"
+SRCREV="80d901318acc389e6e09698a8927bf6eb29da314"
 
 require linux-aspeed.inc