arm64: dts: mediatek: mt8516: reserve 192 KiB for TF-A

The Android DTB for the related MT8167 reserves 0x30000. This is likely
correct for MT8516 Android devices as well, and there's never any harm
in reserving 64KiB more.

Fixes: 5236347b ("arm64: dts: mediatek: add dtsi for MT8516")
Signed-off-by: Val Packett <val@packett.cool>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20241204190524.21862-5-val@packett.cool


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>