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/mmc/mmc.c b/drivers/mmc/mmc.c
index ca62bb9..df550e2 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -11,6 +11,7 @@
 #include <blk.h>
 #include <command.h>
 #include <dm.h>
+#include <log.h>
 #include <dm/device-internal.h>
 #include <errno.h>
 #include <mmc.h>