platform/chrome: cros_typec_vdm: Mark port_amode_ops const

Mark this struct of functions const so it moves to RO memory.

Cc: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Prashant Malani <pmalani@chromium.org>
Link: https://lore.kernel.org/r/20231003003429.1378109-4-swboyd@chromium.org


Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>