usb: ehci-marvell.c: Add DM support

This patch adds driver model (DM) support to the Marvell EHCI driver.
This will be used by the MVEBU SoC's, currently Armada XP and 38x.

Tested on Marvell Armada XP and 38x eval boards.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Luka Perkov <luka.perkov@sartura.hr>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index b30b43d..2a2bffe 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -52,6 +52,13 @@
 
 if USB_EHCI_HCD
 
+config USB_EHCI_MARVELL
+	bool "Support for MVEBU (AXP / A38x) on-chip EHCI USB controller"
+	depends on ARCH_MVEBU
+	default y
+	---help---
+	  Enables support for the on-chip EHCI controller on MVEBU SoCs.
+
 config USB_EHCI_MX6
 	bool "Support for i.MX6 on-chip EHCI USB controller"
 	depends on ARCH_MX6