x86: conga-qeval20-qa3: Add missing MAINTERNERS entry
Add entry for the missing internal UART defconfig to the MAINTAINERS
file.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
CC: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>