linux-aspeed: Move to 5.4.28

This includes security and bug fixes from the 5.4.27 and 5.4.28 stable
releases.

Change-Id: Ieeed7088c9a56e5137476aaf509245e83fcea8e0
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 09666cd..bf9042d 100644
--- a/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-5.4"
-LINUX_VERSION ?= "5.4.26"
+LINUX_VERSION ?= "5.4.28"
 
-SRCREV="e1b4229c95d9e1db375b222c7ba162e88e1f4ed9"
+SRCREV="cb3092099e4a633fafa1ec419d138abe2d23079e"
 
 require linux-aspeed.inc