common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/net/netconsole.c

@@ -7,6 +7,7 @@
 #include <common.h>
 #include <command.h>
 #include <env.h>
+#include <log.h>
 #include <stdio_dev.h>
 #include <net.h>