drm/amdgpu: Fix comparison in amdgpu_res_cpu_visible

It incorrectly claimed a resource isn't CPU visible if it's located at
the very end of CPU visible VRAM.

Fixes: a6ff969fe9cb ("drm/amdgpu: fix visible VRAM handling during faults")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3343
Reviewed-by: Christian König <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Reported-and-Tested-by: Jeremy Day <[e-mail]>
Signed-off-by: Michel Dänzer <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>
CC: [e-mail]

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

···
 
 	amdgpu_res_first(res, 0, res->size, &cursor);
 	while (cursor.remaining) {
-		if ((cursor.start + cursor.size) >= adev->gmc.visible_vram_size)
+		if ((cursor.start + cursor.size) > adev->gmc.visible_vram_size)
 			return false;
 		amdgpu_res_next(&cursor, cursor.size);
 	}