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/clk/renesas/clk-rcar-gen3.c b/drivers/clk/renesas/clk-rcar-gen3.c
index a2011dd..8e1af1c 100644
--- a/drivers/clk/renesas/clk-rcar-gen3.c
+++ b/drivers/clk/renesas/clk-rcar-gen3.c
@@ -14,6 +14,7 @@
 #include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
+#include <log.h>
 #include <wait_bit.h>
 #include <asm/io.h>