Since commit f0a2dad142 ("modules: hal_rpi_pico: disable Pico SDK
runtime auto-init") PICO_RUNTIME_INIT_FUNC() expands to nothing, leaving
the SDK's static EXTEXCLALL initializer unused and breaking every
rp2350a/m33 build with -Werror=unused-function. It never ran under
Zephyr, which drives a single core, so disable it through the SDK's own
option.
Assisted-by: Claude:opus-5
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
737426a187