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/pci/pci.c b/drivers/pci/pci.c
index e8285bf..3b67cd2 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -16,6 +16,7 @@
 
 #include <common.h>
 #include <init.h>
+#include <log.h>
 
 #include <command.h>
 #include <env.h>