common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 097c543..7e3c75b 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -9,6 +9,7 @@
 #include <common.h>
 #include <command.h>
 #include <i2c.h>		/* Functional interface */
+#include <log.h>
 #include <time.h>
 #include <asm/io.h>
 #include <asm/fsl_i2c.h>	/* HW definitions */