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/net/dnet.c b/drivers/net/dnet.c
index 933d1fc..35c2ed9 100644
--- a/drivers/net/dnet.c
+++ b/drivers/net/dnet.c
@@ -9,6 +9,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 
 #ifndef CONFIG_DNET_AUTONEG_TIMEOUT
 #define CONFIG_DNET_AUTONEG_TIMEOUT	5000000	/* default value */