Add sh4ptr_t type, start converting bare pointer refs to it
src/aica/armmem.c
src/bios.c
src/bootstrap.c
src/bootstrap.h
src/dcload.c
src/display.h
src/loader.c
src/lxdream.h
src/maple/controller.c
src/maple/maple.h
...
src/aica/armmem.c
src/bios.c
src/bootstrap.c
src/bootstrap.h
src/dcload.c
src/display.h
src/loader.c
src/lxdream.h
src/maple/controller.c
src/maple/maple.h
...
.