usb: device_next: Change speed selection Kconfig dependency

In my opinion, the user is supposed to configure the speed of the stack
and drivers ough to honor that choice. However current Zephyr USB
maintainer imposes that the dependency is the other way round, i.e.
that user first needs to disable High-Speed chirp at driver level and
only then can select Full-Speed only operation. Adhere to the
arbitrarily set up rule to allow this really necessary functionality to
enter Zephyr.

I consider this change to be harmful because it opens up a Kconfig trap
that allows configuring High-Speed capable stack with a device driver
limited to Full-Speed only operation.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>

drivers/usb/udc/Kconfig

@@ -15,7 +15,11 @@ config UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
 	bool
 
 config UDC_DRIVER_HIGH_SPEED_SUPPORT_ENABLED
-	bool
+	bool "Allow High-Speed chirp"
+	default y if UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
+	help
+	  Allow High-Speed capable device to operate at High-Speed. Disable this
+	  option to force Full-Speed only operation.
 
 config UDC_BUF_COUNT
 	int "Number of buffers in the pool"

subsys/usb/device_next/Kconfig

@@ -24,10 +24,10 @@ choice USBD_MAX_SPEED_CHOICE
 config USBD_MAX_SPEED_HIGH
 	bool "High-Speed"
 	depends on UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
-	select UDC_DRIVER_HIGH_SPEED_SUPPORT_ENABLED
 
 config USBD_MAX_SPEED_FULL
 	bool "Full-Speed"
+	depends on !UDC_DRIVER_HIGH_SPEED_SUPPORT_ENABLED
 
 endchoice