[PATCH v9 6/6] drm/amdgpu: add drm buddy support to amdgpu

- Remove drm_mm references and replace with drm buddy functionalities - Add res cursor support for drm buddy v2(Matthew Auld): - replace spinlock with mutex as we call kmem_cache_zalloc (..., GFP_KERNEL) in drm_buddy_alloc() function - lock drm_buddy_block_trim() function as it calls

[PATCH v9 6/6] drm/amdgpu: add drm buddy support to amdgpu

- Remove drm_mm references and replace with drm buddy functionalities - Add res cursor support for drm buddy v2(Matthew Auld): - replace spinlock with mutex as we call kmem_cache_zalloc (..., GFP_KERNEL) in drm_buddy_alloc() function - lock drm_buddy_block_trim() function as it calls