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: a6ff969 ("drm/amdgpu: fix visible VRAM handling during faults")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3343
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reported-and-Tested-by: Jeremy Day <jsday@noreason.ca>
Signed-off-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org

Author: Michel Dänzer

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

@@ -427,7 +427,7 @@ bool amdgpu_res_cpu_visible(struct amdgpu_device *adev,
 
 	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);
 	}