powerpc, 83xx: add kmsupx5 board support

The Keymile SUPx5 board series is based on a PBEC8321 but
contains an additional PBUS FPGA (LPXF) on local bus CS2.

Signed-off-by: Thomas Reufer <thomas.reufer@keymile.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
cc: Wolfgang Denk <wd@denx.de>
cc: Kim Phillips <kim.phillips@freescale.com>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
diff --git a/boards.cfg b/boards.cfg
index d4f34b3..e02c70d 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -493,6 +493,7 @@
 MVBLM7                       powerpc     mpc83xx     mvblm7              matrix_vision
 SIMPC8313_LP                 powerpc     mpc83xx     simpc8313           sheldon        -           SIMPC8313:NAND_LP
 SIMPC8313_SP                 powerpc     mpc83xx     simpc8313           sheldon        -           SIMPC8313:NAND_SP
+kmsupx5                      powerpc     mpc83xx     km83xx              keymile
 suvd3                        powerpc     mpc83xx     km83xx              keymile
 TQM834x                      powerpc     mpc83xx     tqm834x             tqc
 tuda1                        powerpc     mpc83xx     km83xx              keymile