ppc: Remove gdsys hrcon boards

These boards have not been converted to CONFIG_DM_MMC, along with other
DM conversions, by the deadline.  Remove them.

Cc: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/gdsys/mpc8308/MAINTAINERS b/board/gdsys/mpc8308/MAINTAINERS
index cc0fbeb..dc0b389 100644
--- a/board/gdsys/mpc8308/MAINTAINERS
+++ b/board/gdsys/mpc8308/MAINTAINERS
@@ -2,7 +2,5 @@
 M:	Dirk Eibach <dirk.eibach@gdsys.cc>
 S:	Maintained
 F:	board/gdsys/mpc8308/
-F:	include/configs/hrcon.h
-F:	configs/hrcon_defconfig
-F:	configs/hrcon_dh_defconfig
+F:	include/configs/gazerbeam.h
 F:	configs/gazerbeam_defconfig