Change in flashrom[master]: platform.h: remove IS_LINUX and IS_MACOSX macros

[Thomas Heijligen (Code Review)]

Attention is currently required from:  Felix Singer, Nico Huber, Angel Pons.
Thomas Heijligen has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/58276 )

Change subject: platform.h: remove IS_LINUX and IS_MACOSX macros
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Patch Set 3:

(3 comments)

Commit Message:

https://review.coreboot.org/c/flashrom/+/58276/comment/68b20950_08670b7a 
PS2, Line 7: macro
> `macros`

Done

https://review.coreboot.org/c/flashrom/+/58276/comment/52699650_a4f7818e 
PS2, Line 9: Replace the remaining uses by the plain macros.
> Add an empty line to split paragraphs?

Done

https://review.coreboot.org/c/flashrom/+/58276/comment/ec610bda_284d9632 
PS2, Line 11: easily
> Missing a word here, `can easily *be* handled`?

Done