linux-nuvoton: Move to 5.4

This moves the OpenBMC kernel to a Linux v5.4 base.

Change-Id: I52d0fdeb3e3793514a31d9edc123a7754bef3a4c
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/recipes-kernel/linux/linux-nuvoton_git.bb b/recipes-kernel/linux/linux-nuvoton_git.bb
index 0f12f7c..2d33e37 100644
--- a/recipes-kernel/linux/linux-nuvoton_git.bb
+++ b/recipes-kernel/linux/linux-nuvoton_git.bb
@@ -1,6 +1,6 @@
-KBRANCH ?= "dev-5.2"
-LINUX_VERSION ?= "5.2.11"
+KBRANCH ?= "dev-5.4"
+LINUX_VERSION ?= "5.4.4"
 
-SRCREV="f9e04c3157234671b9d5e27bf9b7025b8b21e0d4"
+SRCREV="6d96543a7ed844fd3923ad30c93db48d3f7f00d0"
 
 require linux-nuvoton.inc