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

[Description]
Refactor and sync kernel/wifi from Openwrt

[Release-log]
N/A

diff --git a/recipes-kernel/linux/linux-mediatek-5.4/mediatek/mt7986.cfg b/recipes-kernel/linux/linux-mediatek-5.4/mediatek/mt7986.cfg
index b4eef30..eb9070e 100644
--- a/recipes-kernel/linux/linux-mediatek-5.4/mediatek/mt7986.cfg
+++ b/recipes-kernel/linux/linux-mediatek-5.4/mediatek/mt7986.cfg
@@ -293,6 +293,7 @@
 CONFIG_LZO_DECOMPRESS=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_MAGIC_SYSRQ_SERIAL=y
+CONFIG_MAXLINEAR_GPHY=y
 CONFIG_MD=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y