usb: Enforce DM_USB migration for USB_HOST devices.

As the deadline for migration to DM_USB, when using a USB host
controller has now gone two years past the deadline, enforce migration.
This is done by:

- Ensuring that all host controller options (other than the very legacy
  old MUSB ones) now select USB_HOST.  USB_HOST now enforces DM_USB and
  OF_CONTROL.
  - Remove other parts of Kconfig logic that had platforms pick DM_USB.
  - To keep Kconfig happy, have some select statements test for USB_HOST
    as well.
- Re-order some Kconfig entries and menus so that we can cleanly pick
  host or gadget roles.  For the various HCD options that have platform
  glue options, group them together and update dependencies in some
  cases.
- As SPL_DM_USB is not required, on platforms that had not yet enabled
  it, disable it.

Cc: Marek Vasut <marex@denx.de>
Cc: Icenowy Zheng <icenowy@aosc.io>
Cc: Samuel Holland <samuel@sholland.org>
Cc: FUKAUMI Naoki <naobsd@gmail.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/usb/emul/Kconfig b/drivers/usb/emul/Kconfig
index ae1ab23..279f6c6 100644
--- a/drivers/usb/emul/Kconfig
+++ b/drivers/usb/emul/Kconfig
@@ -1,6 +1,8 @@
 config USB_EMUL
 	bool "Support for USB device emulation"
-	depends on DM_USB && SANDBOX
+	depends on SANDBOX
+	select DM_USB
+	select USB_HOST
 	help
 	  Since sandbox does not have access to a real USB bus, it is possible
 	  to use device emulators instead. This allows testing of the USB