drm fixes for 5.12-rc6

amdgpu:
- Polaris idle power fix
- VM fix
- Vangogh S3 fix
- Fixes for non-4K page sizes

amdkfd:
- dqm fence memory corruption fix

tegra:
- lockdep warning fix
- runtine PM reference fix
- display controller fix
- PLL Fix

imx:
- memory leak in error path fix
- LDB driver channel registration fix
- oob array warning in LDB driver

exynos
- unused header file removal
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