powerpc/83xx/km: add support for kmopti2 board

This board is similar to TUXX1 but it has a different sized second
FPGA. Therefore the configuration for the third chipselect is different.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
diff --git a/boards.cfg b/boards.cfg
index c1ed138..7f772a0 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -707,6 +707,7 @@
 kmvect1                      powerpc     mpc83xx     km83xx              keymile        -           suvd3:KMVECT1
 tuge1                        powerpc     mpc83xx     km83xx              keymile        -           tuxx1:TUGE1
 tuxx1                        powerpc     mpc83xx     km83xx              keymile        -           tuxx1:TUXX1
+kmopti2                      powerpc     mpc83xx     km83xx              keymile        -           tuxx1:KMOPTI2
 kmsupx5                      powerpc     mpc83xx     km83xx              keymile        -           tuxx1:KMSUPX5
 sbc8548                      powerpc     mpc85xx     sbc8548             -              -           sbc8548
 sbc8548_PCI_33               powerpc     mpc85xx     sbc8548             -              -           sbc8548:PCI,33