hostfs_ioctl:Fixed the error:expected expression caused by not adding parentheses in switch

hostfs/hostfs.c:612:17: error: expected expression
    FAR char *path = (FAR char *)(uintptr_t)arg;

Signed-off-by: chenrun1 <chenrun1@xiaomi.com>

Author: crafcat7

fs/hostfs/hostfs.c

@@ -609,12 +609,14 @@ static int hostfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       switch (cmd)
         {
           case FIOC_FILEPATH:
-            FAR char *path = (FAR char *)(uintptr_t)arg;
-            ret = inode_getpath(filep->f_inode, path, PATH_MAX);
-            if (ret >= 0)
-              {
-                strlcat(path, hf->relpath, PATH_MAX);
-              }
+            {
+              FAR char *path = (FAR char *)(uintptr_t)arg;
+              ret = inode_getpath(filep->f_inode, path, PATH_MAX);
+              if (ret >= 0)
+                {
+                  strlcat(path, hf->relpath, PATH_MAX);
+                }
+            }
 
             break;
           default: