sparc: remove sparc64 syscall entries
sparc: remove sparc64 syscall entries

* linux/sparc/syscallent.h [52, 163]: Unassign.

cuviper/strace,cuviper/strace,Saruta/strace,cuviper/strace,cuviper/strace,cuviper/strace,Saruta/strace,Saruta/strace,Saruta/strace,Saruta/strace