sparc: Enable syscall wrappers for 64-bit (CVE-2009-0029)

[ Upstream commit 67605d6812691bbd2158d2f60259e0407611bc1b ]

sparc64 needs sign-extended function parameters. We have to enable
the system call wrappers.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>