usb: typec: cros-ec-ucsi: Mark cros_ucsi_ops static/const

usb: typec: cros-ec-ucsi: Mark cros_ucsi_ops static/const

This structure isn't used outside this file and can be marked const so
that it gets moved to read-only memory.

Cc: Pavan Holla <pholla@chromium.org>
Cc: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Cc: Łukasz Bartosik <ukaszb@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Łukasz Bartosik <ukaszb@chromium.org>
Link: https://lore.kernel.org/r/20250109220655.1677506-3-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>