arm/km: replace suenx targets with km_kirkwood

suen3 and suen8 were in first HW version quite different, but
now they are from a u-boot point of view similar. So these
two boards can use the same header file. Other keymile boards
differ only in the usage of the PCI interface. Therefore
a target km_kirkwood_pci was introduced. All targets use
the same header file.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
cc: Heiko Schocher <hs@denx.de>
diff --git a/boards.cfg b/boards.cfg
index 8b71a2c..6e5e535 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -115,8 +115,8 @@
 davinci_schmoogie            arm         arm926ejs   schmoogie           davinci        davinci
 davinci_sffsdr               arm         arm926ejs   sffsdr              davinci        davinci
 davinci_sonata               arm         arm926ejs   sonata              davinci        davinci
-suen3                        arm         arm926ejs   km_arm              keymile        kirkwood
-suen8                        arm         arm926ejs   km_arm              keymile        kirkwood
+km_kirkwood                  arm         arm926ejs   km_arm              keymile        kirkwood	km_kirkwood:KM_DISABLE_PCI
+km_kirkwood_pci              arm         arm926ejs   km_arm              keymile        kirkwood	km_kirkwood
 mgcoge3un                    arm         arm926ejs   km_arm              keymile        kirkwood
 guruplug                     arm         arm926ejs   -                   Marvell        kirkwood
 mv88f6281gtw_ge              arm         arm926ejs   -                   Marvell        kirkwood