0428233dbfec25fe56a8189b2e8f7e6fb61189ff

cores: add spi declaration

diff --cc simavr/cores/sim_90usb162.c
Simple merge

diff --cc simavr/cores/sim_mega128.c
Simple merge

diff --cc simavr/cores/sim_mega1280.c
Simple merge

diff --cc simavr/cores/sim_mega1281.c
Simple merge

diff --cc simavr/cores/sim_mega128rfr2.c
Simple merge

diff --cc simavr/cores/sim_mega169.c
Simple merge

diff --cc simavr/cores/sim_mega2560.c
Simple merge

diff --cc simavr/cores/sim_megax.h
Simple merge