config/ppc: reduce number of cores and NUMA nodes

config/ppc: reduce number of cores and NUMA nodes

When setting RTE_MAX_LCORES to the maximum value supported by ppc
hardware (1536), the lcores_autotest may timeout after 30 seconds
because the test takes nearly 60 seconds to complete. Set max_lcores to
a lower value because the maximum value is unlikely to be seen in any
production systems and to eliminate the quick test timeout error.

Bugzilla ID: 684
Fixes: db1f2f8a9fe5 ("config: increase maximum lcores for ppc")
Cc: stable@dpdk.org
Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Acked-by: Luca Boccassi <bluca@debian.org>