arm64: __NR_compat_syscalls fix

This fixes commit 6290b53de025 (arm64: compat: Wire up new AArch32 syscalls)
which did not update __NR_compat_syscalls accordingly.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: <stable@vger.kernel.org> # 3.14+
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Git-commit: 838977f0178334bf3d7f3e974ea3154b68979be0
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>