[rdk-b][common][bsp][Refactor and sync kernel from Openwrt]

[Description]
Refactor and sync kernel from Openwrt to v5.4.219

[Release-log]
N/A

diff --git a/recipes-kernel/linux/linux-mediatek_5.4.bb b/recipes-kernel/linux/linux-mediatek_5.4.bb
index 06ca553..aecbc7d 100644
--- a/recipes-kernel/linux/linux-mediatek_5.4.bb
+++ b/recipes-kernel/linux/linux-mediatek_5.4.bb
@@ -7,8 +7,8 @@
 
 KBRANCH ?= "linux-5.4.y"
 
-LINUX_VERSION ?= "5.4.215"
-SRCREV_machine ?= "6215647d9699cb8f1bf7333ec849242c4a9cf9a6"
+LINUX_VERSION ?= "5.4.219"
+SRCREV_machine ?= "fd92cfed8bc6668d314acd1e6da708a80826f768"
 KMETA = "kernel-meta"
 SRCREV_meta ?= "feeb59687bc0f054af837a5061f8d413ec7c93e9"