usb, ohci: add warning if none on pci found

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 23ea2af..58aa824 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -2047,8 +2047,11 @@
 		pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
 		printf("OHCI regs address 0x%08x\n", base);
 		gohci.regs = (struct ohci_regs *)base;
-	} else
+	} else {
+		printf("%s: OHCI devnr: %d not found\n", __func__,
+		       CONFIG_PCI_OHCI_DEVNO);
 		return -1;
+	}
 #else
 	gohci.regs = (struct ohci_regs *)CONFIG_SYS_USB_OHCI_REGS_BASE;
 #endif