Kconfig: OMAP: USB: Migrate CONFIG_USB_EHCI_OMAP to Kconfig

Follow the exiting logic for the i.MX options when migrating this
option.

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 03c15dd..9a67e43 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -105,6 +105,14 @@
 	---help---
 	  Enables support for the on-chip EHCI controller on i.MX7 SoCs.
 
+config USB_EHCI_OMAP
+	bool "Support for OMAP3+ on-chip EHCI USB controller"
+	depends on ARCH_OMAP2PLUS
+	default y
+	---help---
+	  Enables support for the on-chip EHCI controller on OMAP3 and later
+	  SoCs.
+
 if USB_EHCI_MX7
 
 config MXC_USB_OTG_HACTIVE