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/pch/pch9.c b/drivers/pch/pch9.c
index fd61f16..3bd0115 100644
--- a/drivers/pch/pch9.c
+++ b/drivers/pch/pch9.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <pch.h>
 
 #define GPIO_BASE	0x48