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/fpga/altera.c b/drivers/fpga/altera.c
index 7c8f518..bb27b37 100644
--- a/drivers/fpga/altera.c
+++ b/drivers/fpga/altera.c
@@ -13,6 +13,7 @@
 #include <common.h>
 #include <errno.h>
 #include <ACEX1K.h>
+#include <log.h>
 #include <stratixII.h>
 
 /* Define FPGA_DEBUG to 1 to get debug printf's */