The -march=atom flag is for older atom CPUs and don't support SSE4 which
is the minimum requirement for DPDK. And in fact, the current atom CPUs
support SSE4. So this patch removes atom as a target for DPDK builds and
adds a silvermont replacement instead.
Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
