drm/amdgpu: Use correct address to setup gart page table for vram access

Use dst input parameter to setup gart page table entries instead of using fixed
location.

Fixes: 237d623ae659 ("drm/amdgpu/gart: Add helper to bind VRAM pages (v2)")
Signed-off-by: Xiaogang Chen <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>
(cherry picked from commit ca5d4db8db843be7ed35fc9334737490c2b58d32)

drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c

···
  * @start_page: first page to map in the GART aperture
  * @num_pages: number of pages to be mapped
  * @flags: page table entry flags
- * @dst: CPU address of the GART table
+ * @dst: valid CPU address of GART table, cannot be null
  *
  * Binds a BO that is allocated in VRAM to the GART page table
  * (all ASICs).
···
 		return;
 
 	for (i = 0; i < num_pages; ++i) {
-		amdgpu_gmc_set_pte_pde(adev, adev->gart.ptr,
+		amdgpu_gmc_set_pte_pde(adev, dst,
 			start_page + i, pa + AMDGPU_GPU_PAGE_SIZE * i, flags);
 	}