flashrom currently takes a global lock when running. This prevents multiple flashrom instances from running at the same time.

flashrom -r -p raiden_debug_spi:serial=CMO653-00166-040489J03560 -V /tmp/fwupdater.4VD04f                              
Acquiring lock (timeout=180 sec)...                                                                                                           
Opened file lock "/run/lock/firmware_utility_lock"                                                                                            
Lock acquired.

Instead we should append the devices serial number to the lock file so that we can have one flashrom instance per programmer running.