eal: do not panic on hugepage info init

eal: do not panic on hugepage info init

When attempting to scan hugepages, signal to the eal that an error has
occurred, rather than performing a panic.

If we fail to acquire hugepage information, simply signal an error to
the application.  This clears the run_once counter, allowing the user or
application to take a corrective action and retry.

Signed-off-by: Aaron Conole <aconole@redhat.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>