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/misc/mpc83xx_serdes.c b/drivers/misc/mpc83xx_serdes.c
index d572dda..2d40621 100644
--- a/drivers/misc/mpc83xx_serdes.c
+++ b/drivers/misc/mpc83xx_serdes.c
@@ -11,6 +11,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <mapmem.h>
 #include <misc.h>