runfvp: Stop the FVP when telnet shuts down cleanly

At the moment, when using the --console flag, if telnet is shut down
cleanly (i.e. by typing "quit" at the prompt instead of Ctrl+C), runfvp
still waits on the FVP to exit of its own accord, so hangs.

Move the fvp.run() call so that when telnet quits, it immediately
proceeds to shut down the FVP.

Issue-Id: SCM-4954
Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
Change-Id: I2169c99586a1eebc2c6ab4b2e15fb0c769fc81a8
Signed-off-by: Jon Mason <jon.mason@arm.com>

scripts/runfvp

@@ -64,8 +64,8 @@ async def start_fvp(args, config, extra_args):
             logger.debug(f"Telnet quit, cancelling tasks")
         else:
             fvp.add_line_callback(lambda line: print(line))
+            await fvp.run()
 
-        await fvp.run()
     finally:
         await fvp.stop()