drm/amdgpu: correct vram_info for HBM2E

correct atom_vram_info_header_v2_6 and its vram_module.

Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>