Fix dual-drivers configs for Marlin #25748

[drawlerr]

Since Marlin #25748, dual config doesn't work on Marlin/bugfix-2.1.x branch.

[V1EngineeringInc]

Well shoot, thank you for finding this. Odd that this is a silent error. I wonder how long that has been going on. I need to dig a bit deeper and fix all the configs.

Thank you thank you thank you!

[V1EngineeringInc]

Oh I see it now, a rename.....

[thijstriemstra]

see https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/Marlin/src/inc/Changes.h#L648

[V1EngineeringInc]

Thank you both!

I didn't mean to push it without testing my added changes but I hit the wrong button...whoops.