[PATCH] USB: Kconfig fixes for usb/gadget

This prevents gadget drivers from being selected when no controller has
been selected, by adding an additional boolean and depending on it.
It's mostly to help "allmodconfig".
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/Kconfig

@@ -53,6 +53,9 @@ config USB_GADGET_DEBUG_FILES
 	   driver on a new board.   Enable these files by choosing "Y"
 	   here.  If in doubt, or to conserve kernel memory, say "N".
 
+config	USB_GADGET_SELECTED
+	boolean
+
 #
 # USB Peripheral Controller Support
 #
@@ -85,6 +88,7 @@ config USB_NET2280
 	tristate
 	depends on USB_GADGET_NET2280
 	default USB_GADGET
+	select USB_GADGET_SELECTED
 
 config USB_GADGET_PXA2XX
 	boolean "PXA 25x or IXP 4xx"
@@ -105,6 +109,7 @@ config USB_PXA2XX
 	tristate
 	depends on USB_GADGET_PXA2XX
 	default USB_GADGET
+	select USB_GADGET_SELECTED
 
 # if there's only one gadget driver, using only two bulk endpoints,
 # don't waste memory for the other endpoints
@@ -134,6 +139,7 @@ config USB_GOKU
 	tristate
 	depends on USB_GADGET_GOKU
 	default USB_GADGET
+	select USB_GADGET_SELECTED
 
 
 config USB_GADGET_LH7A40X
@@ -146,6 +152,7 @@ config USB_LH7A40X
 	tristate
 	depends on USB_GADGET_LH7A40X
 	default USB_GADGET
+	select USB_GADGET_SELECTED
 
 
 config USB_GADGET_OMAP
@@ -167,6 +174,7 @@ config USB_OMAP
 	tristate
 	depends on USB_GADGET_OMAP
 	default USB_GADGET
+	select USB_GADGET_SELECTED
 
 config USB_OTG
 	boolean "OTG Support"
@@ -207,6 +215,7 @@ config USB_DUMMY_HCD
 	tristate
 	depends on USB_GADGET_DUMMY_HCD
 	default USB_GADGET
+	select USB_GADGET_SELECTED
 
 # NOTE:  Please keep dummy_hcd LAST so that "real hardware" appears
 # first and will be selected by default.
@@ -226,7 +235,7 @@ config USB_GADGET_DUALSPEED
 #
 choice
 	tristate "USB Gadget Drivers"
-	depends on USB_GADGET
+	depends on USB_GADGET && USB_GADGET_SELECTED
 	default USB_ETH
 	help
 	  A Linux "Gadget Driver" talks to the USB Peripheral Controller