sunxi: usb: USB_MUSB_SUNXI move to musb-new Kconfig

Now that the musb-new driver has a Kconfig, we can move Kconfig options to
enable controllers to it, so that it's easier in e.g. menuconfig.

In addition, this allows declaring support for USB_MUSB_HOST/GADGET in
defconfigs instead of the USB_MUSB_SUNXI controller, that will get selected
automatically when needed.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/configs/Mini-X_defconfig b/configs/Mini-X_defconfig
index c721c87..00b6c63 100644
--- a/configs/Mini-X_defconfig
+++ b/configs/Mini-X_defconfig
@@ -9,5 +9,5 @@
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
 CONFIG_USB_EHCI_HCD=y
-CONFIG_USB_MUSB_SUNXI=y
+CONFIG_USB_MUSB_HOST=y
 CONFIG_USB0_VBUS_PIN="PB9"