DM: change audio passthrough parameter

Use right parameter in launch_uos.sh after updating prefer_msi option

Signed-off-by: Edwin Zhai <edwin.zhai@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>

devicemodel/samples/apl-mrb/launch_uos.sh

@@ -283,7 +283,7 @@ fi
    -s 13,virtio-rpmb \
    -s 10,virtio-hyper_dmabuf \
    -s 11,wdt-i6300esb \
-   -s 14,passthru,0/e/0 \
+   -s 14,passthru,0/e/0,keep_gsi \
    -s 23,passthru,0/17/0 \
    -s 15,passthru,0/f/0 \
    -s 27,passthru,0/1b/0 \
@@ -292,7 +292,6 @@ fi
    $boot_ipu_option      \
    -i /run/acrn/ioc_$vm_name,0x20 \
    -l com2,/run/acrn/ioc_$vm_name \
-   -M \
    $boot_image_option \
    --enable_trusty \
    -B "$kernel_cmdline" $vm_name