powerpc: mpc83xx: remove board support for MERGERBOX and MVBLM7

These boards have been orphaned for more than 6 months.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/doc/README.scrapyard b/doc/README.scrapyard
index 036bc83..3caa8cf 100644
--- a/doc/README.scrapyard
+++ b/doc/README.scrapyard
@@ -12,6 +12,8 @@
 
 Board            Arch        CPU            Commit      Removed     Last known maintainer/contact
 =================================================================================================
+MERGERBOX        powerpc     mpc83xx        -           -           Andre Schwarz <andre.schwarz@matrix-vision.de>
+MVBLM7           powerpc     mpc83xx        -           -           Andre Schwarz <andre.schwarz@matrix-vision.de>
 bluestone        powerpc     ppc4xx         -           -           Tirumala Marri <tmarri@apm.com>
 CRAYL1           powerpc     ppc4xx         -           -           David Updegraff <dave@cray.com>
 KAREF            powerpc     ppc4xx         -           -           Travis Sawyer <travis.sawyer@sandburst.com>