Revert "GPU: Move code to board file"

This reverts commit 51456b2d44d06466dcdf79bc1b1204de7abb3c7b.
Revert "Ville: Add Avtimer and add a seperate gpu file"

This reverts commit 035d4bcfa305395f9d54fd860bf97486aa3b5f24.
gpu overclock

Signed-off-by: flar2 <asegaert@gmail.com>
Ville: Add Avtimer and add a seperate gpu file

Signed-off-by: flar2 <asegaert@gmail.com>
GPU: Move code to board file

Signed-off-by: flar2 <asegaert@gmail.com>