arch: add pkey and rseq syscall numbers everywhere

Most architectures define system call numbers for the rseq and pkey system
calls, even when they don't support the features, and perhaps never will.

Only a few architectures are missing these, so just define them anyway
for consistency. If we decide to add them later to one of these, the
system call numbers won't get out of sync then.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/kernel/syscalls/syscall.tbl

@@ -388,6 +388,10 @@
 378	common	pwritev2			sys_pwritev2
 379	common	statx				sys_statx
 380	common	seccomp				sys_seccomp
+381	common	pkey_mprotect			sys_pkey_mprotect
+382	common	pkey_alloc			sys_pkey_alloc
+383	common	pkey_free			sys_pkey_free
+384	common	rseq				sys_rseq
 # room for arch specific calls
 393	common	semget				sys_semget
 394	common	semctl				sys_semctl