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/forfun_q88db_defconfig b/configs/forfun_q88db_defconfig
index 8f10c25..6fff725 100644
--- a/configs/forfun_q88db_defconfig
+++ b/configs/forfun_q88db_defconfig
@@ -9,7 +9,7 @@
 CONFIG_VIDEO_LCD_POWER="AXP0-0"
 CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
 CONFIG_VIDEO_LCD_BL_PWM="PB2"
-CONFIG_USB_MUSB_SUNXI=y
+CONFIG_USB_MUSB_HOST=y
 CONFIG_DEFAULT_DEVICE_TREE="sun5i-a13-forfun-q88db"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL=y