net: airoha: npu: Add missing MODULE_FIRMWARE macros

Introduce missing MODULE_FIRMWARE definitions for firmware autoload.

Fixes: 23290c7b ("net: airoha: Introduce Airoha NPU support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250801-airoha-npu-missing-module-firmware-v2-1-e860c824d515@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>