Revert "lenovo/t400/4.5-1564-g6fa36c9c2c-dirty/2017-04-16T13_28_27Z"

This reverts commit e5454d36ca2f96e452a228db9a1485bff2e8f32e.

The commit in question deletes a lot of unrelated files, and needs to be
reverted.
diff --git a/asus/kfsn4-dre/4.4-543-g15fa992/2016-06-20T22_49_12Z/rom_checksum.txt b/asus/kfsn4-dre/4.4-543-g15fa992/2016-06-20T22_49_12Z/rom_checksum.txt
new file mode 100644
index 0000000..f255f47
--- /dev/null
+++ b/asus/kfsn4-dre/4.4-543-g15fa992/2016-06-20T22_49_12Z/rom_checksum.txt
@@ -0,0 +1 @@
+d94ae9c375b03ca777193cafc324831a *build/coreboot.rom