feat(usb_host): Added KConfig parameter for External HUB support enable

components/usb/Kconfig

@@ -93,7 +93,6 @@ menu "USB-OTG"
 
                 The default value is set to 10 ms to be safe.
 
-
     endmenu #Root Hub configuration
 
     # Hidden or compatibility options
@@ -115,4 +114,11 @@ menu "USB-OTG"
             If enabled, the enumeration filter callback can be set via 'usb_host_config_t' when calling
             'usb_host_install()'.
 
+    config USB_HOST_EXT_HUB_SUPPORT
+        depends on IDF_EXPERIMENTAL_FEATURES
+        bool "Support USB HUB (Experimental)"
+        default n
+        help
+            Feature is under development.
+
 endmenu #USB-OTG

components/usb/include/usb/usb_helpers.h

@@ -12,9 +12,12 @@ Warning: The USB Host Library API is still a beta version and may be subject to
 
 #include <stdint.h>
 #include "esp_err.h"
+#include "sdkconfig.h"
 #include "usb/usb_types_stack.h"
 #include "usb/usb_types_ch9.h"
+#if (CONFIG_USB_HOST_EXT_HUB_SUPPORT)
 #include "usb/usb_types_ch11.h"
+#endif // CONFIG_USB_HOST_EXT_HUB_SUPPORT
 
 #ifdef __cplusplus
 extern "C" {