Kconfig: USB: Migrate existing USB_EHCI_xxx options

The following options are migrated over fully now:
- USB_EHCI_ATMEL
- USB_EHCI_MARVELL
- USB_EHCI_MX6
- USB_EHCI_MX7
- USB_EHCI_MSM
- USB_EHCI_ZYNQ
- USB_EHCI_GENERIC

This also requires fixing the depends on USB_EHCI_MARVELL as it's used
by Orion5X and Kirkwood as well.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index ab2ae73..03c15dd 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -85,8 +85,8 @@
 	  Enables support for the on-chip EHCI controller on Atmel chips.
 
 config USB_EHCI_MARVELL
-	bool "Support for MVEBU (AXP / A38x) on-chip EHCI USB controller"
-	depends on ARCH_MVEBU
+	bool "Support for Marvell on-chip EHCI USB controller"
+	depends on ARCH_MVEBU || KIRKWOOD || ORION5X
 	default y
 	---help---
 	  Enables support for the on-chip EHCI controller on MVEBU SoCs.