arm: Get rid of the INTERMEDIATE variable used on exynos.

The INTERMEDIATE variable was used to hook dd-ing the BL1 into the image for
Exynos SOCs, but we can do that directly without having a special hook.

BUG=None
TEST=Built for pit and snow and verified that the BL1 was still copied into
the image as expected.
BRANCH=None

Change-Id: I434506b52ca4ea1d01e25a785cbfe66dfdea21c4
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/170921
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
3 files changed