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/lattice.c b/drivers/fpga/lattice.c
index 30bec7f..2cf4a60 100644
--- a/drivers/fpga/lattice.c
+++ b/drivers/fpga/lattice.c
@@ -11,6 +11,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <malloc.h>
 #include <fpga.h>
 #include <lattice.h>