arm64: defconfig: Enable Marvell WiFi-Ex PCIe driver

Enable the wireless network driver to support the WiFi adapter
present in RK3399 Kevin Chromebooks. Note that this also
enables Bluetooth via USB.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/configs/defconfig

@@ -247,6 +247,8 @@ CONFIG_USB_NET_SMSC95XX=m
 CONFIG_USB_NET_PLUSB=m
 CONFIG_USB_NET_MCS7830=m
 CONFIG_BRCMFMAC=m
+CONFIG_MWIFIEX=m
+CONFIG_MWIFIEX_PCIE=m
 CONFIG_WL18XX=m
 CONFIG_WLCORE_SDIO=m
 CONFIG_INPUT_EVDEV=y