km/ppc832x: join config files

There are no differences for the different 832x targets we have in
the header defined with SYS_CONFIG_NAME. So we can join the five
headers to a single file.

Signed-off-by: Holger Brunck <holger.brunck@hitachienergy.com>
diff --git a/board/keymile/km83xx/Kconfig b/board/keymile/km83xx/Kconfig
index f87a2e6..9bdacee 100644
--- a/board/keymile/km83xx/Kconfig
+++ b/board/keymile/km83xx/Kconfig
@@ -69,7 +69,7 @@
 	default "keymile"
 
 config SYS_CONFIG_NAME
-	default "tuxx1"
+	default "km832x"
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
@@ -88,7 +88,7 @@
 	default "keymile"
 
 config SYS_CONFIG_NAME
-	default "kmsupx5"
+	default "km832x"
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
@@ -107,7 +107,7 @@
 	default "keymile"
 
 config SYS_CONFIG_NAME
-	default "tuge1"
+	default "km832x"
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
@@ -126,7 +126,7 @@
 	default "keymile"
 
 config SYS_CONFIG_NAME
-	default "kmopti2"
+	default "km832x"
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
@@ -145,7 +145,7 @@
 	default "keymile"
 
 config SYS_CONFIG_NAME
-	default "kmtepr2"
+	default "km832x"
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y