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/efi.c b/cmd/efi.c
index c7640c8..9aeb913 100644
--- a/cmd/efi.c
+++ b/cmd/efi.c
@@ -8,6 +8,7 @@
 #include <command.h>
 #include <efi.h>
 #include <errno.h>
+#include <log.h>
 #include <malloc.h>
 #include <sort.h>