acrn-config: acrn-config: add white list to skip item check

Some acrn-dm arguments are not needed when launch some vm, but the
item check fucntion still has strict check on the arguments, which
result in the script generating failure.
This patch add whilte list to skip the check.

Tracked-On: #3852
Signed-off-by: Wei Liu <weix.w.liu@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>

misc/acrn-config/library/launch_cfg_lib.py

@@ -462,6 +462,10 @@ def args_aval_check(arg_list, item, avl_list):
     """
     # args should be set into launch xml from webUI
     i_cnt = 1
+    skip_check_list = ['gvt_args', 'rootfs_dev']
+    if item in skip_check_list:
+        return
+
     for arg_str in arg_list.values():
         if arg_str == None or not arg_str.strip():
             empty_err(i_cnt, item)