docs: admin-guide: Move edid.rst from driver-api

This document describes actions that an admin can do, rather than
interfaces available to driver developers, so admin-guide seems to
be a more appropriate place for it.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/admin-guide/index.rst b/Documentation/admin-guide/index.rst
index f1d0ccf..5a6269f 100644
--- a/Documentation/admin-guide/index.rst
+++ b/Documentation/admin-guide/index.rst
@@ -75,6 +75,7 @@
    cputopology
    dell_rbu
    device-mapper/index
+   edid
    efi-stub
    ext4
    nfs/index