AVX512 is a x86 specific feature, So, enable AVX512
warning only on x86.
Fixes: a32ca9a4ebc1 ("mk: fix scope of disabling AVX512F support")
Cc: stable@dpdk.org
Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>