drm/tegra: Fixes for v4.16-rc7

This contains two small fixes for the alpha blending support that was
merged into v4.16-rc1 and a fix for connector reference leaks caused by
the fact that display pipelines are no longer automatically disabled if
the framebuffer is removed.

Furthermore this contains a fix for a crash on IOMMU detach at driver
unbind time and a regulator enable/disable unbalance fix.
-----BEGIN PGP SIGNATURE-----
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=iuUO
-----END PGP SIGNATURE-----