config: override the kernel config if asked

When '--defconfig' is used (or --allnoconfig), the kernel config is
supposed to be overridden. It was only done if there was no .config
file.

Now the kernel config is always overridden if asked.

Fixes: 6ade5a7 ("virtme: improve configkernel")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>

virtme/commands/configkernel.py

@@ -306,7 +306,7 @@ def do_it():
     if config_dir and os.path.isdir(config_dir):
         config = os.path.join(config_dir, config)
 
-    if not os.path.exists(config):
+    if maketarget is not None or not os.path.exists(config):
         # Set up an initial config
         if maketarget is None:
             maketarget = arch.defconfig_target