Due to commit e40aee2954d2beabe1d8c530d9ff1e564fb01f48 we now honour the
targets 'reset_config' setting. Previously we ignored the srst setting
for luminary targets.
Luminary targets have never supported using srst to reset into debug mode
so remove the option from the target configs files.
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>