add flash procedure for catalina

Summary: Nothing special just copy across from yosemite4.  XXX should be codegen.

Test Plan:
```
0 ~/local/openbmc/tools/flashy $ ./build.sh && ./build_dev.sh && go test ./...
?       github.com/facebook/openbmc/tools/flashy/flash_procedure        [no test files]
?       github.com/facebook/openbmc/tools/flashy/lib/logger     [no test files]
?       github.com/facebook/openbmc/tools/flashy/tests  [no test files]
?       github.com/facebook/openbmc/tools/flashy/utilities      [no test files]
ok      github.com/facebook/openbmc/tools/flashy        2.405s
ok      github.com/facebook/openbmc/tools/flashy/checks_and_remediations/bletchley      (cached)
ok      github.com/facebook/openbmc/tools/flashy/checks_and_remediations/common 0.215s
ok      github.com/facebook/openbmc/tools/flashy/checks_and_remediations/wedge100       (cached)
ok      github.com/facebook/openbmc/tools/flashy/checks_and_remediations/yamp   (cached)
ok      github.com/facebook/openbmc/tools/flashy/install        0.004s
ok      github.com/facebook/openbmc/tools/flashy/lib/fileutils  (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/flash      (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/flash/flashcp      (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/flash/flashutils   (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/flash/flashutils/devices   (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/step       (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/utils      (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/validate   (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/validate/image     (cached)
ok      github.com/facebook/openbmc/tools/flashy/lib/validate/partition (cached)
0 ~/local/openbmc/tools/flashy $
```

Reviewed By: lsiudut

Differential Revision:
D68015478

Privacy Context Container: L1188897

fbshipit-source-id: 8bd229be7809900b062b96b6868539e60f9e6a30

tools/flashy/flash_procedure/flash_catalina.go

@@ -0,0 +1,29 @@
+/**
+ * Copyright 2020-present Facebook. All Rights Reserved.
+ *
+ * This program file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program in a file named COPYING; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ */
+
+package flash_procedure
+
+import (
+	"github.com/facebook/openbmc/tools/flashy/lib/flash"
+	"github.com/facebook/openbmc/tools/flashy/lib/step"
+)
+
+func init() {
+	step.RegisterStep(flash.FlashCp)
+}