Collect opal-prd log file in FFDC

Changes:
    - Added /var/log/opal-prd file entry.

Resolves openbmc/openbmc-test-automation#1335

Change-Id: Ide3e236a36aa26aebb8561c6575d91a97ffb483b
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/openbmc_ffdc_list.py b/lib/openbmc_ffdc_list.py
index 25356df..ddb7c04 100755
--- a/lib/openbmc_ffdc_list.py
+++ b/lib/openbmc_ffdc_list.py
@@ -54,6 +54,7 @@
         'OS_msglog': 'cat /sys/firmware/opal/msglog',
         'OS_cpufrequency': 'ppc64_cpu --frequency',
         'OS_dmesg': 'dmesg',
+        'OS_opal_prd': 'cat /var/log/opal-prd',
         'OS_boot': 'cat /var/log/boot.log',
         'OS_procinfo': 'cat /proc/cpuinfo',
         'OS_meminfo': 'cat /proc/meminfo',