[PATCH] arch: adapt arch-syscall-validate to Linux 6.11

[PATCH] arch: adapt arch-syscall-validate to Linux 6.11

The aarch64, loongarch64 and riscv64 architectures have their syscall
table sources changed to scripts/syscall.tbl, from the original
inclusion of asm-generic/unistd.h. Make the script recognize the new
format for these architectures.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Gbp-Pq: Name arch_adapt_arch-syscall-validate_to_Linux_6.11.patch