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/mpc83xx_clk.c b/drivers/clk/mpc83xx_clk.c
index fa519a4..4c77c8d 100644
--- a/drivers/clk/mpc83xx_clk.c
+++ b/drivers/clk/mpc83xx_clk.c
@@ -9,6 +9,7 @@
 #include <clock_legacy.h>
 #include <command.h>
 #include <dm.h>
+#include <log.h>
 #include <vsprintf.h>
 #include <dm/lists.h>
 #include <dt-bindings/clk/mpc83xx-clk.h>