arm/km: remove portl2.h and use km_kirkwood instead

The additional headerfile is unneeded here, we can use the generic
km_kirkwood.h instead. And we can use the better config option
KM_PIGGY4_88E6061 for the specific features for boards with this
design in km_arm.c.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Gerlando Falauto <gerlando.falauto@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/include/configs/km_kirkwood.h b/include/configs/km_kirkwood.h
index f5b9d27..44a3e7a6 100644
--- a/include/configs/km_kirkwood.h
+++ b/include/configs/km_kirkwood.h
@@ -83,6 +83,14 @@
 #define CONFIG_HOSTNAME			kmcoge5un
 #define CONFIG_KM_DISABLE_PCIE
 #define CONFIG_KM_PIGGY4_88E6352
+
+/* KM_PORTL2 */
+#elif defined(CONFIG_KM_PORTL2)
+#define CONFIG_IDENT_STRING		"\nKeymile Port-L2"
+#define CONFIG_HOSTNAME			portl2
+#define KM_IVM_BUS			"pca9544a:70:9" /* I2C2 (Mux-Port 1)*/
+#define CONFIG_KM_PIGGY4_88E6061
+
 #else
 #error ("Board unsupported")
 #endif