linux-aspeed: Move to 4.18.12

This includes security and bug fixes from the 4.18.9, 4.18.10, 4.18.11
and 4.18.12 stable releases.

Change-Id: I72d2c2d33e94315a5e5e3a97eba267132dae3248
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 c8d91bf..65fb3cc 100644
--- a/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-4.18"
-LINUX_VERSION ?= "4.18.8"
+LINUX_VERSION ?= "4.18.12"
 
-SRCREV="39b1aa557c5fd2bb540362e409a97a61a339806f"
+SRCREV="b29e57c654b8d7cfa15d632fbc0ebfe0897b8203"
 
 require linux-aspeed.inc