USB: fix USB_OHCI_HCD_SSB dependencies

This patch fixes a bug introduced by
commit b22817b3.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/Kconfig

@@ -156,7 +156,7 @@ config USB_OHCI_HCD_PCI
 
 config USB_OHCI_HCD_SSB
 	bool "OHCI support for Broadcom SSB OHCI core"
-	depends on USB_OHCI_HCD && (SSB = y || SSB = CONFIG_USB_OHCI_HCD) && EXPERIMENTAL
+	depends on USB_OHCI_HCD && (SSB = y || SSB = USB_OHCI_HCD) && EXPERIMENTAL
 	default n
 	---help---
 	  Support for the Sonics Silicon Backplane (SSB) attached