eal: make the -n argument optional
eal: make the -n argument optional

Obtaining the correct value of memory channels, especially from a
running system, can be anything from difficult to plain impossible.
Since the value is merely an optimization and does not affect functionality
otherwise, its pointless to force such a guess on users initially, such
things belong to performance tuning phase.

Signed-off-by: Panu Matilainen <ef9891457927ceb95d483a81954cf06349274890@redhat.com>
Acked-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@6wind.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk