xcompile: only enforce BFD linker on x86

The ARM linker scripts work fine with the gold linker.
This also requires to enhance the LINKER_SUFFIX variable
with a platform suffix so that it can be different on
ARMv7 and x86

BUG=none
BRANCH=none
TEST=boot tested on pit

Change-Id: I7d3b57991b1e40d0305be3fc4bc63d322392d98e
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/168771
Reviewed-by: Ronald Minnich <rminnich@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed