spl: Drop include of i2c.h

This file does not appear to use I2C, so drop this include.

Signed-off-by: Simon Glass <sjg@chromium.org>

common/spl/spl.c

@@ -13,7 +13,6 @@
 #include <nand.h>
 #include <fat.h>
 #include <version.h>
-#include <i2c.h>
 #include <image.h>
 #include <malloc.h>
 #include <dm/root.h>