libpayload: Drop usb_fatal()

We have fatal(), which is just as good.

Coccinelle script:
  @@
  expression E;
  @@
  -usb_fatal(E)
  +fatal(E)

Change-Id: Iabecbcc7d068cc0f82687bf51d89c2626642cd86
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/395
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
diff --git a/payloads/libpayload/drivers/usb/usbhid.c b/payloads/libpayload/drivers/usb/usbhid.c
index 57f60cf..840b298 100644
--- a/payloads/libpayload/drivers/usb/usbhid.c
+++ b/payloads/libpayload/drivers/usb/usbhid.c
@@ -421,7 +421,7 @@
 		case hid_boot_proto_keyboard:
 			dev->data = malloc (sizeof (usbhid_inst_t));
 			if (!dev->data)
-				usb_fatal("Not enough memory for USB HID device.\n");
+				fatal("Not enough memory for USB HID device.\n");
 			debug ("  configuring...\n");
 			usb_hid_set_protocol(dev, interface, hid_proto_boot);
 			usb_hid_set_idle(dev, interface, KEYBOARD_REPEAT_MS);