config: enable C11 memory model for armv8 with meson

config: enable C11 memory model for armv8 with meson

This patch makes the configuration based on makefile and the
configuration based on meson to be the same.

Fixes: c6e536e38437 ("build: add more implementers IDs and PNs for ARM")
Cc: stable@dpdk.org
Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>