mpc8xx: remove lwmon board support

This board is still a non-generic board.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Wolfgang Denk <wd@denx.de>
diff --git a/doc/README.scrapyard b/doc/README.scrapyard
index 6b391df..1f5ff8f 100644
--- a/doc/README.scrapyard
+++ b/doc/README.scrapyard
@@ -12,6 +12,7 @@
 
 Board            Arch        CPU            Commit      Removed     Last known maintainer/contact
 =================================================================================================
+lwmon            powerpc     mpc8xx         -           -           Wolfgang Denk <wd@denx.de>
 NETVIA           powerpc     mpc8xx         -           -           Pantelis Antoniou <panto@intracom.gr>
 R360MPI          powerpc     mpc8xx         -           -           Wolfgang Denk <wd@denx.de>
 RRvision         powerpc     mpc8xx         -           -           Wolfgang Denk <wd@denx.de>