Squashed 'avr/bootloaders/optiboot_flash/' changes from b75ee5a..696a2c8
Squashed 'avr/bootloaders/optiboot_flash/' changes from b75ee5a..696a2c8

696a2c8 Fix macro

git-subtree-dir: avr/bootloaders/optiboot_flash
git-subtree-split: 696a2c8f72768b42dc407cef91f8466555850cda

MCUdude/MajorCore,MCUdude/MajorCore,MCUdude/MajorCore