- Added docs from reference manual / fixed existing partial copy of
reference manual docs
- Renamed System Flash case to SYSTEM_FLASH because FLASH was ambiguous
(you really don't want to activate the System Flash when you wanted
Main Flash, where your program lives!)
- Added Main Flash case.
It looks like the G0 file here picked up the F0-style "one remapping bit
for both pins" field definition. The G0 series actually has C0-style
dual remapping bits.
