Just like Dr. POSIX ordered. Move the macro where it belongs, but make
sure it's visible to Userland files compiled with -DKERNEL. Parts of
LibEDID that are compiled into the Kernel use offsetof to parse the
EDID information given to us by hardware.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
