check: Only test usb-ehci when it is compiled in

The ehci test also test uhci.  Welcome to the worderfull world of USB.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>

tests/Makefile.include

@@ -286,8 +286,10 @@ check-qtest-i386-$(CONFIG_USB_OHCI) += tests/usb-hcd-ohci-test$(EXESUF)
 gcov-files-i386-$(CONFIG_USB_OHCI) += hw/usb/hcd-ohci.c
 check-qtest-i386-$(CONFIG_USB_UHCI) += tests/usb-hcd-uhci-test$(EXESUF)
 gcov-files-i386-$(CONFIG_USB_UHCI) += hw/usb/hcd-uhci.c
+ifeq ($(CONFIG_USB_ECHI)$(CONFIG_USB_UHCI),yy)
 check-qtest-i386-y += tests/usb-hcd-ehci-test$(EXESUF)
-gcov-files-i386-y += hw/usb/hcd-ehci.c
+endif
+gcov-files-i386-$(CONFIG_USB_EHCI) += hw/usb/hcd-ehci.c
 gcov-files-i386-y += hw/usb/dev-hid.c
 gcov-files-i386-y += hw/usb/dev-storage.c
 check-qtest-i386-y += tests/usb-hcd-xhci-test$(EXESUF)