Build: fix 'BL stage' comment for build macros

The MAKE_BL macro is invoked for 1, 2, 2u, 31, 32.

Fix the comments.

Change-Id: I35dd25cc2ea13885c184fb9c8229a322b33f7e71
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
1 file changed