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/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index c3f95b2..de9a2ea 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
+#include <log.h>
 #include <mailbox.h>
 #include <malloc.h>
 #include <dm/device.h>