[BUG] Uncompilable for mega1280

[vk-PyNoob]

Did you test the latest bugfix-2.0.x code?

Yes, and the problem still exists.

Bug Description

Error while build for Geetech2560 with mega1280:

In file included from Marlin\src\inc/../pins/mega/pins_GT2560_REV_A.h:31:0,
from Marlin\src\inc/../pins/pins.h:242,
from Marlin\src\inc/MarlinConfig.h:34,
from Marlin\src\MarlinCore.h:24,
from Marlin\src\MarlinCore.cpp:31:
Marlin\src\inc/../pins/mega/env_validate.h:27:4: error: #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"

I think that's because of this code in : Marlin\src\pins\mega\env_validate.h

#pragma once

#if ENABLED(ALLOW_MEGA1280) && NOT_TARGET(AVR_ATmega1280, AVR_ATmega2560)
#error "Oops! Select 'Arduino/Genuino Mega or Mega 2560 or 1280' in 'Tools > Board.'"
#elif NOT_TARGET(AVR_ATmega2560) <---
#error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
#endif

#undef ALLOW_MEGA1280

changing this:

#elif NOT_TARGET(AVR_ATmega2560)

to

#elif NOT_TARGET(AVR_ATmega1280, AVR_ATmega2560)

so it is compilable, but may be not correct

Steps to Reproduce

Set target to mega1280 & try to build

Version of Marlin Firmware

2.0.8.2 Latest & bugfix

Electronics

Geetech GT2560 Rev.A (with mega1280)

[ellensp]

This is fixed, closing

[github-actions]

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