Bug#872330: nvidia-legacy-340xx-kernel-dkms: Build against Linux 4.12 fails

[Daniel Franganillo]

As usual, there's a patch on the nvidia forums[1].

Regards.

[1]
https://devtalk.nvidia.com/default/topic/1008771/linux/nvidia-340-xx-compile-error-with-kernel-4-12-rc1/post/5179612/#5179612
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Daniel Franganillo