MIPS: loongson3_defconfig: Enable blk_dev_nvme by default

A significant number of 3A4000 machines come with NVMe drives
pre-installed, so we should support it in its defconfig.

Tested-by: Erpeng Xu <xuerpeng@uniontech.com>
Tested-by: Qiang Ma <maqianga@uniontech.com>
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: Avenger-285714

arch/mips/configs/loongson3_defconfig

@@ -141,6 +141,7 @@ CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=8192
 CONFIG_VIRTIO_BLK=y
+CONFIG_BLK_DEV_NVME=m
 CONFIG_RAID_ATTRS=m
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_DEV_SR=y