Draft 40

email: adjust cover letter for PATCH v1

* Update cover letter
  * Add link to Arm's virtio-msg FF-A spec
  * Add link to QEMU RFC
  * Add link to LKML RFC
  * Updated Edgar's QEMU branch
  * Text to say this is not an RFC any more
* Update email subject title
* Add Armelle to CC list

Update 3:
* Remove paragraph about how much of bus should be documented

Signed-off-by: Bill Mills <bill.mills@linaro.org>