linux-aspeed: Move to 5.4.8

This includes security and bug fixes from the 5.4.8 stable release.

Change-Id: I70499319178fdc9a4c625b68c5118027625bf7ba
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 51e9efb..2aab747 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 ?= "5.4.7"
+LINUX_VERSION ?= "5.4.8"
 
-SRCREV="db79ad554eabb24ddeb18e966688b591a5abd517"
+SRCREV="498f2bd1599d3a8e99278d20ccdb411ad56d89fb"
 
 require linux-aspeed.inc