[PATCH slof] README: Update with patch submittion note

[Alexey Kardashevskiy]

This adds a maillist and emails to be used when posting a patch for SLOF.

Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Thomas Huth <thuth at redhat.com>
Cc: Nikunj A Dadhania <nikunj at linux.vnet.ibm.com>
Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---

I was asked to describe somewhere how to post new patches so this is the first
attempt. Please fix my english and add/remove personal emails and any other
comments are also welcome. Thanks!

---
 README | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/README b/README
index 58e9294..b81fd08 100644
--- a/README
+++ b/README
@@ -11,6 +11,7 @@ Index
 2.2 Overview of the source code
 2.4 Extending the Forth engine
 3.0 Limitations
+4.0 Submitting patches
 
 
 1.0 Introduction to Slimline Open Firmware
@@ -236,6 +237,15 @@ To add primitives:
  On a JS21 all memory configurations should work.
 
 
+4.0 Submitting patches
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+Patches for SLOF should be made against https://github.com/aik/SLOF,
+the master branch and posted to linuxppc-dev at ozlabs.org. It is
+recommended also cc: to aik at ozlabs.ru, nikunj at linux.vnet.ibm.com,
+thuth at redhat.com.
+
+
 Documentation
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
-- 
2.4.0.rc3.8.gfb3e7d5