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/CSQ_CS908_defconfig b/configs/CSQ_CS908_defconfig
index fe88a7b..7c8eca8 100644
--- a/configs/CSQ_CS908_defconfig
+++ b/configs/CSQ_CS908_defconfig
@@ -15,4 +15,4 @@
 CONFIG_AXP221_DLDO1_VOLT=3300
 CONFIG_AXP221_ALDO1_VOLT=3300
 CONFIG_USB_EHCI_HCD=y
-CONFIG_USB_MUSB_SUNXI=y
+CONFIG_USB_MUSB_HOST=y