[PATCH 3.16.y-ckt 122/185] drm/radeon: SDMA fix hibernation (CI GPU family).

3.16.7-ckt15 -stable review patch. If anyone has any objections, please let me know. -- From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= commit 2ba8d1bb8f6b589037f7db1f01144fc80750e8f7 upstream. In order for hibernation to reliably work we need to properly turn off the SDMA

[PATCH 3.16.y-ckt 122/185] drm/radeon: SDMA fix hibernation (CI GPU family).

3.16.7-ckt15 -stable review patch. If anyone has any objections, please let me know. -- From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= jgli...@redhat.com commit 2ba8d1bb8f6b589037f7db1f01144fc80750e8f7 upstream. In order for hibernation to reliably work we need to properly turn