USB: fix HCD Kconfig goofage

Add a missing dependency which goofs up the xconfig display.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 49a91c5e..9b202d5 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -79,6 +79,7 @@
 
 config USB_EHCI_FSL
 	bool
+	depends on USB_EHCI_HCD
 	select USB_EHCI_ROOT_HUB_TT
 	default y if MPC834x || PPC_MPC831x
 	---help---