* spu/syscalls.c: Change __send_to_ppe to return the result stored
in stored in slot 0 of the data, rather than have each assisted
call retrieve the value.
* spu/jsre.h: Remove the now unused syscall_out_t.
* spu/access.c: Use the __send_to_ppe result instead of the slot 0
value, remove unused syscall_out_t variable.
* spu/close.c: Ditto.
* spu/dup.c: Ditto.
* spu/fstat.c: Ditto.
* spu/ftruncate.c: Ditto.
* spu/gettimeofday.c: Ditto.
* spu/lseek.c: Ditto.
* spu/open.c: Ditto.
* spu/read.c: Ditto.
* spu/stat.c: Ditto.
* spu/unlink.c: Ditto.
* spu/write.c: Ditto.