linux-aspeed: Move to 4.19.21

This includes security and bug fixes from the 4.19.20 and
4.19.21 stable releases.

(From meta-aspeed rev: 2702d64577033e90cdca33b08a4d99cd7e108597)

Change-Id: Ib26c3b4c61664e1b41135fe83db484da2a8e0888
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb b/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
index 9640c9c..e27482b 100644
--- a/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-4.19"
-LINUX_VERSION ?= "4.19.19"
+LINUX_VERSION ?= "4.19.21"
 
-SRCREV="3931734021a55283294733ce514803842833d2f4"
+SRCREV="d808d27f70f7d4158151534ed0a28ab7dae62b8d"
 
 require linux-aspeed.inc