MPC824x: remove obsolete "PN62" board

The MPC824x processors have long reached EOL, and the PN62 board has
not seen any board-specific updates for more than a decade.  It is now
causing build issues.  Instead of wasting time on things nobody is
interested in any more, we rather drop this board.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Wolfgang Grandegger <wg@grandegger.com>
cc: Tom Rini <trini@ti.com>
diff --git a/doc/README.scrapyard b/doc/README.scrapyard
index 8ed09c7..c3182e4 100644
--- a/doc/README.scrapyard
+++ b/doc/README.scrapyard
@@ -11,6 +11,7 @@
 
 Board            Arch        CPU            Commit      Removed     Last known maintainer/contact
 =================================================================================================
+pn62             powerpc     mpc824x        -           2013-11-11  Wolfgang Grandegger <wg@grandegger.com>
 pdnb3            arm         ixp            -           2013-09-24  Stefan Roese <sr@denx.de>
 scpu             arm         ixp            -           2013-09-24  Stefan Roese <sr@denx.de>
 omap1510inn      arm         arm925t        0610a16     2013-09-23  Kshitij Gupta <kshitij@ti.com>