arm: mvebu: turris_omnia: add XHCI to defconfig

Add XHCI_HOST and XHCI_MVEBU to defconfig, so that user's can by default
boot from USB on Turris Omnia.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index 999425e..f75d9f5 100644
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -59,5 +59,7 @@
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_MVEBU=y
 CONFIG_WDT=y
 CONFIG_WDT_ORION=y