script: set virtio-console BE to stdio for LaaG

Set virtio-console BE to stdio for LaaG. Remove 'com1' but still keep
'console=ttyS0' in Laag kernel cmdline.
'console=ttyS0' means LaaG will use ttyS0 (0x3F8) as a console port, and
during bringup, it will access port ttyS0. When the same port is added
to hypervisor configuration file as a console port, the output will be
captured by hypervisor console, and can switch by "vm_console <vm_id>".

Tracked-On: #3370
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>

devicemodel/samples/nuc/launch_uos.sh

@@ -95,9 +95,9 @@ logger_setting="--logger_setting console,level=4;kmsg,level=3;disk,level=5"
 #for memsize setting
 mem_size=2048M
 
-acrn-dm -A -m $mem_size -c $2 -s 0:0,hostbridge -s 1:0,lpc -l com1,stdio \
+acrn-dm -A -m $mem_size -c $2 -s 0:0,hostbridge \
   -s 2,pci-gvt -G "$3" \
-  -s 5,virtio-console,@pty:pty_port \
+  -s 5,virtio-console,@stdio:stdio_port \
   -s 6,virtio-hyper_dmabuf \
   -s 3,virtio-blk,/home/clear/uos/uos.img \
   -s 4,virtio-net,tap0 \