Blackfin: unify cpu and boot modes

All of the duplicated code for Blackfin processors and boot modes have been
unified.  After all, the core is the same for all processors, just the
peripheral set differs (which gets handled in the drivers).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/cpu/blackfin/.gitignore b/cpu/blackfin/.gitignore
new file mode 100644
index 0000000..0ec9d56
--- /dev/null
+++ b/cpu/blackfin/.gitignore
@@ -0,0 +1 @@
+bootrom-asm-offsets.[chs]