common: Drop linux/crc8.h

We have an existing U-Boot header for the one function that this defines.
Use that instead of the linux/ one. Move over the nice comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

lib/crc8.c

@@ -3,7 +3,12 @@
  * Copyright (c) 2013 Google, Inc
  */
 
-#include "linux/crc8.h"
+#ifdef USE_HOSTCC
+#include <arpa/inet.h>
+#else
+#include <common.h>
+#endif
+#include <u-boot/crc.h>
 
 #define POLY	(0x1070U << 3)