sh64: Symbol export fixups.

Kill off the __div_table reference, modern compilers don't have it,
and old compilers can't build the sh64 kernel anyways.

__copy_user also needs to be exported to satisfy module builds.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --cc arch/sh64/kernel/sh_ksyms.c
Simple merge