ifdtool/Makefile: use static dependencies

The generated dependencies doesn't work when
used together with our main build system.

Change-Id: I93d26858e961d7e275d586a1b8a26b3d33f3bd41
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/16572
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
1 file changed