arch/arm/src/stm32h5/stm32_usbdrdhost.c: Fixed Hub support

[dlizewski]

Fixed a few bugs in the initial stm32_usbdrdhost.c implementation when using a USB hub. Fixed fault when freeing control endpoints. Fixed crash when disconnecting devices from hubs due ot use after free.

Note: Please adhere to Contributing Guidelines.

Summary

In the initial STM32H5 USB host support I forgot to test devices with a USB hub.
A few changes were needed to get USB hub working.
Added missing hub specific calls and fixed freeing control endpoints that were allocated through the hub.

I also fixed a crash when disconnecting a device from a hub becasue connport->devclass->connect was
already set to NULL after CLASS_DISCONNECTED

Impact

• Given that I only merged STM32H5 USB host 2 days ago and this only adds support, there should ne no negative impact.
  Only adds new features.

Testing

• I have updated nucleo-h563zi:nshmsc to enable USB hub support.
• With full USB info debugs enabled,:
• I connected a hub
• connected a USB thumb drive to the hub
• disconnected the drive from the hub
• reconnected the drive
• disconnected the hub and drive together
• reconnected
• verified the thumb drive is still working by running the commands:

mount -t vfat /dev/sda /mnt/flash
ls /mnt/flash
cat /mnt/flash/TEST_F~1.TXT

Logs of the above are attached:
stm32h5_usb_with_hub.txt