linux-aspeed: Move to 5.8.12

This includes security and bug fixes from the 5.8.9, 5.8.10, 5.8.11 and
5.8.12 stable releases.

Change-Id: Ie0587645063f65270dd2e3608a2d1ef572741e5f
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 ac1aa2c..b839a82 100644
--- a/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-5.8"
 LINUX_VERSION ?= "5.8.8"
 
-SRCREV="07252eae1d7ea5203c67c6717d7864f9e80d2a4c"
+SRCREV="9dfd247baa45a6f0e148cfde11526de2ca9f9dce"
 
 require linux-aspeed.inc