Enabled USB_SERIAL_CH341

Change-Id: Ib791db0e05af6785f4c8316dd80aa36fb2b25b14
Reviewed-on: https://tp-biosrd-v02/gerrit/81869
Reviewed-by: Jamess Huang(黃以民) <Jamess_Huang@asus.com>
Tested-by: Jamess Huang(黃以民) <Jamess_Huang@asus.com>

Author: fttx

arch/arm/configs/miniarm-rk3288_defconfig

@@ -609,6 +609,7 @@ CONFIG_USB_SERIAL_OTI6858=y
 CONFIG_USB_SERIAL_QUALCOMM=y
 CONFIG_USB_SERIAL_SIERRAWIRELESS=y
 CONFIG_USB_SERIAL_OPTION=y
+CONFIG_USB_SERIAL_CH341=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_CONFIGFS=y
 CONFIG_USB_CONFIGFS_F_FS=y