usb: host: omap: common usb host core driver

enabling and disabling the common clocks for ehci
and ohci is implemented. usbhs is a common parent
platform driver for EHCI and OHCI driver. This driver
receives the clock enable and disable requests
from ehci and ohci drivers.The UHH and TLL
initialization is also performed.

Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index fd01836..a6dfa37a 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -624,6 +624,15 @@
 	  driver connects the radio-wl1273 V4L2 module and the wl1273
 	  audio codec.
 
+config MFD_OMAP_USB_HOST
+	bool "Support OMAP USBHS core driver"
+	depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
+	default y
+	help
+	  This is the core driver for the OAMP EHCI and OHCI drivers.
+	  This MFD driver does the required setup functionalities for
+	  OMAP USB Host drivers.
+
 endif # MFD_SUPPORT
 
 menu "Multimedia Capabilities Port drivers"