BOARD_ANET_10 with REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER fails to compile

[ellensp]

Bug Description

The Combination of BOARD_ANET_10 with REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER fails to compile.
This is the default for a Anet A6
This is with Current bugfix
The error is: 'DIOLCD_PINS_D7_DDR' was not declared in this scope

Configuration Files

Standard unmodified Anet A6 bugfix example config files
Config files.zip

Steps to Reproduce

1. Download marlin bugfix
2. Download marlin bugfix example configurations (or attached config file)
3. Copy Anet A6 Config files into Marlin
4. Attempt to compile.

Expected behavior:

It should compile

Actual behavior:

Compiling .pio\build\melzi\src\src\lcd\menu\menu_main.cpp.o
In file included from Marlin\src\lcd\../inc/../HAL/./AVR/HAL.h:22:0,
from Marlin\src\lcd\../inc/../HAL/HAL.h:30,
from Marlin\src\lcd\../inc/MarlinConfig.h:31,
from Marlin\src\lcd\marlinui.cpp:23:
Marlin\src\lcd\marlinui.cpp: In static member function 'static void MarlinUI::init()':
Marlin\src\lcd\../inc/../HAL/./AVR/fastio.h:86:35: error: 'DIOLCD_PINS_D7_DDR' was not declared in this scope

Additional Information

This was raised on Reprap forum https://reprap.org/forum/read.php?415,880180,880182
The cause is PR #19890

The root cause in this PR is in pins_ANET_10.h

#if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
    #define BTN_ENC_EN               LCD_PINS_D7  // Detect the presence of the encoder
  #endif

But LCD_PINS_D7 is not defined for this type of LCD.

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