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/sh_i2c.c b/drivers/i2c/sh_i2c.c
index 834f1f2..5cc5095 100644
--- a/drivers/i2c/sh_i2c.c
+++ b/drivers/i2c/sh_i2c.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <i2c.h>
+#include <log.h>
 #include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;