Enable the execution of run_platform.py when no values for pmu configuration are defined

Define default values

Jira: MLBEDSW-5215
Change-Id: Ie498f7170804a2f1a6d3eb64fff4c859272efe2b
diff --git a/scripts/run_platform.py b/scripts/run_platform.py
index c0ee822..a084faa 100755
--- a/scripts/run_platform.py
+++ b/scripts/run_platform.py
@@ -42,18 +42,14 @@
 
 def build_core_platform(output_folder, target, toolchain, pmu):
     build_folder = output_folder/"model"/"build"
-    inner_pmu = [0, 0, 0, 0]
-    for idx in range(len(pmu)):
-        inner_pmu[idx] = pmu[idx]
     cmake_cmd = ["cmake",
                  CORE_PLATFORM_PATH/"targets"/target,
                  f"-B{build_folder}",
                  f"-DCMAKE_TOOLCHAIN_FILE={CORE_PLATFORM_PATH/'cmake'/'toolchain'/(toolchain + '.cmake')}",
-                 f"-DBAREMETAL_PATH={output_folder}",
-                 f"-DETHOSU_PMU_EVENT_0={inner_pmu[0]}",
-                 f"-DETHOSU_PMU_EVENT_1={inner_pmu[1]}",
-                 f"-DETHOSU_PMU_EVENT_2={inner_pmu[2]}",
-                 f"-DETHOSU_PMU_EVENT_3={inner_pmu[3]}"]
+                 f"-DBAREMETAL_PATH={output_folder}"]
+    if pmu:
+        for i in range(len(pmu)):
+            cmake_cmd += [f"-DETHOSU_PMU_EVENT_{i}={pmu[i]}"]
 
     run_cmd(cmake_cmd)