Fixed issue with automatic config variant selection, where we were not properly handling XMEGA targets with the JTAG physical interface.

Also introduced new AVR8 families, for D series targets.
Also moved AVR family param outside of TargetParameters struct

src/Targets/Microchip/AVR/AVR8/TargetDescription/TargetDescriptionFile.hpp

@@ -36,6 +36,9 @@ namespace Bloom::Targets::Microchip::Avr::Avr8Bit::TargetDescription
                 {"avr tiny", Family::TINY},
                 {"tinyavr", Family::TINY},
                 {"tinyavr 2", Family::TINY},
+                {"avr da", Family::DA},
+                {"avr db", Family::DB},
+                {"avr dd", Family::DD},
             };
         };