powerpc/powernv: Add XHCI and USB storage to defconfig

These are common on bare metal machines, so put them in the defconfig.

This adds 216KB to the vmlinux size
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/configs/powernv_defconfig

@@ -220,10 +220,11 @@ CONFIG_HID_SUNPLUS=y
 CONFIG_USB_HIDDEV=y
 CONFIG_USB=y
 CONFIG_USB_MON=m
+CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_EHCI_HCD=y
 # CONFIG_USB_EHCI_HCD_PPC_OF is not set
 CONFIG_USB_OHCI_HCD=y
-CONFIG_USB_STORAGE=m
+CONFIG_USB_STORAGE=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=m
 CONFIG_LEDS_POWERNV=m