linux-aspeed: Move to v5.15.59 stable release

This includes security and bug fixes from the 5.15.51 through to 5.15.59
stable releases.

Change-Id: I0e4917a3cd0c461730d8f7b1fb029878a5b7ff05
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb b/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
index 2467c1c..403f28b 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-5.15"
-LINUX_VERSION ?= "5.15.50"
+LINUX_VERSION ?= "5.15.59"
 
-SRCREV="261c7d5d6ef9d6c9e2642a2a2cb220fd532e89cc"
+SRCREV="51fd11bc67a7f1387098dd8a045414e74190ab80"
 
 require linux-aspeed.inc