Add PowerNV specific debug data

This patch adds support to collect more debug files on
PowerNV platform.

Signed-off-by: Vasant Hegde <hegdevasant linux vnet ibm com>
Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
---
 sos/plugins/powerpc.py |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)