Add a universal flash command for cli (#6224)

* Add universal flash command

* Add bootloader info to I:C boards

* Add support for ATSAM

* Add messages for flash target

* Message cleanup

* Add USB ASP Flashing target

* Make usbasp target more universal

* Add phoney target for usbasp

* Clarify error message when bootloader isn't matched

keyboards/whitefox/rules.mk

@@ -57,6 +57,8 @@ OPT_DEFS =
 DFU_ARGS = -d 1c11:b007
 DFU_SUFFIX_ARGS = -p b007 -v 1c11
 
+BOOTLOADER = dfu
+
 # Build Options
 #   comment out to disable the options.
 #