hw/arm: Add missing psci_conduit to NPCM8XX SoC boot info

hw/arm: Add missing psci_conduit to NPCM8XX SoC boot info

Without psci_conduit, the Linux kernel crashes almost immediately.

    psci: probing for conduit method from DT.
    Internal error: Oops - Undefined instruction: 0000000002000000 [#1] PREEMPT SMP

Fixes: ae0c4d1a1290 ("hw/arm: Add NPCM8XX SoC")
Cc: qemu-stable@nongnu.org
Cc: Hao Wu <wuhaotsh@google.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 20250315142050.3642741-1-linux@roeck-us.net
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit e6bc01777e5a4b6ecf3414b21a2d7b4846bf4817)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>