MLBEDSW-2306 Added more supported mem-cfgs

Additional supported memory configurations:
-Permanent_storage = DRAM
-Tensor arena either in DRAM or SRAM

Signed-off-by: Patrik Gustavsson <patrik.gustavsson@arm.com>
Change-Id: I20beb7151e306bfdba540e7c0b2a7b478b4d94e1
diff --git a/ethosu/vela/stats_writer.py b/ethosu/vela/stats_writer.py
index 9bbb9db..c90d987 100644
--- a/ethosu/vela/stats_writer.py
+++ b/ethosu/vela/stats_writer.py
@@ -201,7 +201,10 @@
                             for k in indices[2]:
                                 res += round_up_to_int(ps.bandwidths[i, j, k])
                         stats.append(res)
-                    stats += [ps.sram_used]
+                    try:
+                        stats += [ps.sram_used]
+                    except AttributeError:
+                        stats += [0]
 
                     writer.writerow(stats)