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/cmd/fpga.c b/cmd/fpga.c
index 47307bf..8ae1c93 100644
--- a/cmd/fpga.c
+++ b/cmd/fpga.c
@@ -14,6 +14,7 @@
 #include <fs.h>
 #include <gzip.h>
 #include <image.h>
+#include <log.h>
 #include <malloc.h>
 
 static long do_fpga_get_device(char *arg)