i2c: Cleanup the includes of <linux/i2c.h>

Clean up the includes of <linux/i2c.h>. Only include this header file
when we actually need it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

include/media/ovcamchip.h

@@ -16,7 +16,6 @@
 
 #include <linux/videodev.h>
 #include <media/v4l2-common.h>
-#include <linux/i2c.h>
 
 /* --------------------------------- */
 /*           ENUMERATIONS            */