linux-aspeed: Move to 5.1.9

This includes security and bug fixes from the 5.1.8 and 5.1.9 stable
releases.

Change-Id: If88ea2d88246bbf4d664ed82c0821b1c55d554ca
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 1ad0278..e0a6f4e 100644
--- a/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-5.1"
-LINUX_VERSION ?= "5.1.7"
+LINUX_VERSION ?= "5.1.9"
 
-SRCREV="a17b8ac585d7faa27799f425fa4326c7a1e7ae71"
+SRCREV="620eb1d3094d52c7e6b55b729de967ba1fc85bd9"
 
 require linux-aspeed.inc