IssuID:1626:Comparing an array to null is not useful "dp->vfs_dirent.d_name !=...

IssuID:1626:Comparing an array to null is not useful "dp->vfs_dirent.d_name != NULL" since the test will always evaluate as true

[Detail]
Remove null check "dp->vfs_dirent.d_name != NULL" for "dp->vfs_dirent.d_name" is an array.

[Verified Cases]
Build Pass: <solution list>
Test Pass: <test case list>

components/ramfs/src/ramfs_vfs.c

@@ -330,13 +330,9 @@ static vfs_dirent_t *ramfs_vfs_readdir(vfs_file_t *fp, vfs_dir_t *dir)
     int32_t          res = -1;
 
     dp = fp->f_arg;
-
-    if (dp->vfs_dirent.d_name != NULL) {
-        res = ramfs_readdir(&(dp->ramfs_dir), dp->vfs_dirent.d_name);
-
-        if (res == 0) {
-            ret = &dp->vfs_dirent;
-        }
+    res = ramfs_readdir(&(dp->ramfs_dir), dp->vfs_dirent.d_name);
+    if (res == 0) {
+        ret = &dp->vfs_dirent;
     }
 
     return ret;