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/cs8900.c b/drivers/net/cs8900.c
index 9331cdf..f840e11 100644
--- a/drivers/net/cs8900.c
+++ b/drivers/net/cs8900.c
@@ -25,6 +25,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <log.h>
 #include <asm/io.h>
 #include <net.h>
 #include <malloc.h>