linux-firmware: add README

basic info about how to submit files or patches.
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

README

+
+	Linux firmware
+	==============
+
+  <http://git.kernel.org/?p=linux/kernel/git/firmware/linux-firmware.git>
+
+  git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
+
+This repository contains all these firmware images which have been
+extracted from older drivers, as well various new firmware images which
+we were never permitted to include in a GPL'd work, but which we _have_
+been permitted to redistribute under separate cover.
+
+To submit firmware to this repository, please send either a git binary
+diff or preferably a git pull request to:
+      David Woodhouse <dwmw2@infradead.org>
+      Ben Hutchings <ben@decadent.org.uk>
+and also cc: to related mailing lists.
+
+Your commit should include an update to the WHENCE file clearly
+identifying the licence under which the firmware is available, and
+that it is redistributable. If the licence is long and involved, it's
+permitted to include it in a separate file and refer to it from the
+WHENCE file.
+And if it were possible, a changelog of the firmware itself.
+
+Ideally, your commit should contain a Signed-Off-By: from someone
+authoritative on the licensing of the firmware in question (i.e. from
+within the company that owns the code).
+
+
+WARNING:
+=======
+
+Don't send any "CONFIDENTIALITY STATEMENT" in your e-mail, patch or
+request. Otherwise your firmware _will never be accepted_.
+
+Maintainers are really busy, so don't expect a prompt reply.