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/phy/mscc.c b/drivers/net/phy/mscc.c
index 72bbda5..9fd5ca7 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -9,6 +9,7 @@
  *
  */
 
+#include <log.h>
 #include <miiphy.h>
 #include <bitfield.h>
 #include <time.h>