powerpc/83xx/km: cleanup tuxx1 support

This is a preparation for the upcoming kmopti2 board. This board has
also a second fpga on board which is different to the tuxx1 target. But we
want to use the same header file. So remove the config option
KM_DISABLE_APP2 and simply use the board names to distinguish the features.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
diff --git a/boards.cfg b/boards.cfg
index b1319aa..c1ed138 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -705,9 +705,9 @@
 TQM834x                      powerpc     mpc83xx     tqm834x             tqc
 suvd3                        powerpc     mpc83xx     km83xx              keymile        -           suvd3:SUVD3
 kmvect1                      powerpc     mpc83xx     km83xx              keymile        -           suvd3:KMVECT1
-tuge1                        powerpc     mpc83xx     km83xx              keymile        -           tuxx1:KM_DISABLE_APP2,TUGE1
-tuxx1                        powerpc     mpc83xx     km83xx              keymile
-kmsupx5                      powerpc     mpc83xx     km83xx              keymile        -           tuxx1:KM_DISABLE_APP2,KMSUPX5
+tuge1                        powerpc     mpc83xx     km83xx              keymile        -           tuxx1:TUGE1
+tuxx1                        powerpc     mpc83xx     km83xx              keymile        -           tuxx1:TUXX1
+kmsupx5                      powerpc     mpc83xx     km83xx              keymile        -           tuxx1:KMSUPX5
 sbc8548                      powerpc     mpc85xx     sbc8548             -              -           sbc8548
 sbc8548_PCI_33               powerpc     mpc85xx     sbc8548             -              -           sbc8548:PCI,33
 sbc8548_PCI_33_PCIE          powerpc     mpc85xx     sbc8548             -              -           sbc8548:PCI,33,PCIE