cros_bundle_firmware: drop ancient u-boot support

BUG=chromium:595715
BRANCH=none
TEST=none

Change-Id: I5e6b6f08ec6423c08c391e557cd0fe2c42c8874e
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://chromium-review.googlesource.com/393746
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
diff --git a/host/lib/bundle_firmware.py b/host/lib/bundle_firmware.py
index 0b18cc5..6c896d5 100644
--- a/host/lib/bundle_firmware.py
+++ b/host/lib/bundle_firmware.py
@@ -1133,15 +1133,7 @@
     fdt = Fdt(self._tools, fdt_fname)
     self._fdt_fname = fdt_fname
 
-    # For upstream, select the correct architecture .dtsi manually.
-    if self._board == 'link' or 'x86' in self._board:
-      arch_dts = 'coreboot.dtsi'
-    elif self._board == 'daisy':
-      arch_dts = 'exynos5250.dtsi'
-    else:
-      arch_dts = 'tegra124.dtsi'
-
-    fdt.Compile(arch_dts)
+    fdt.Compile(None)
     fdt = fdt.Copy(os.path.join(self._tools.outdir, 'updated.dtb'))
 
     if fdt.GetProp('/flash', 'reg', ''):