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/net/sni_ave.c b/drivers/net/sni_ave.c
index 0f66508..8f651fa 100644
--- a/drivers/net/sni_ave.c
+++ b/drivers/net/sni_ave.c
@@ -8,6 +8,7 @@
 #include <cpu_func.h>
 #include <dm.h>
 #include <fdt_support.h>
+#include <log.h>
 #include <malloc.h>
 #include <miiphy.h>
 #include <net.h>