fix：修复函数返回错误等问题

Signed-off-by: zhangdengyu <zhangdengyu2@huawei.com>

testsuites/kernel/sample/kernel_extend/cpup/smoke/It_extend_cpup_001.c

@@ -39,8 +39,10 @@ extern "C" {
 
 static UINT32 TaskF02(VOID)
 {
-    UINT32 ret, cpupUse;
+    UINT32 ret = OS_ERROR;
+    UINT32 cpupUse;
     g_cpupTestCount++;
+
     // 2, Here, assert that g_cpupTestCount is equal to the expected value.
     ICUNIT_GOTO_EQUAL(g_cpupTestCount, 2, g_cpupTestCount, EXIT);
     cpupUse = LOS_HistoryProcessCpuUsage(g_testTaskID01, CPUP_ALL_TIME);

testsuites/kernel/sample/kernel_extend/cpup/smoke/It_extend_cpup_002.c

@@ -39,9 +39,10 @@ extern "C" {
 
 static UINT32 TaskF01(VOID)
 {
-    UINT32 ret;
+    UINT32 ret = OS_ERROR;
     UINT32 cpupUse;
     g_cpupTestCount++;
+
     ICUNIT_GOTO_EQUAL(g_cpupTestCount, 1, g_cpupTestCount, EXIT);
 
     cpupUse = LOS_HistoryProcessCpuUsage(LOS_GetCurrProcessID(), CPU_USE_MODE0);