parisc: Wire up seccomp, getrandom and memfd_create syscalls

With secure computing we only support the SECCOMP_MODE_STRICT mode for
now.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --cc arch/parisc/Kconfig
Simple merge

diff --cc arch/parisc/include/asm/seccomp.h
Simple merge

diff --cc arch/parisc/include/asm/thread_info.h
Simple merge

diff --cc arch/parisc/include/uapi/asm/unistd.h
Simple merge

diff --cc arch/parisc/kernel/ptrace.c
Simple merge

diff --cc arch/parisc/kernel/syscall_table.S
Simple merge