On shared-memory AMD APUs (e.g. Strix Halo), rocm-smi VRAM is only the
BIOS UMA carve-out while usable HIP memory lives in GTT. Query
--showmeminfo all and fold GTT when the VRAM/GTT ratio matches an APU,
preserving dedicated dGPU accounting.
Fixes#12058
Signed-off-by: lei_lei <imleilei123@gmail.com>