powerpc: ppc4xx: Move CANYONLANDS/GLACIER/ARCHES to Kconfig

Move these options to Kconfig and remove them from the CONFIG files.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/amcc/canyonlands/Kconfig b/board/amcc/canyonlands/Kconfig
index 530a6ef..0fc6877 100644
--- a/board/amcc/canyonlands/Kconfig
+++ b/board/amcc/canyonlands/Kconfig
@@ -9,4 +9,24 @@
 config SYS_CONFIG_NAME
 	default "canyonlands"
 
+choice BOARD_TYPE
+	prompt "Select which board to build for"
+
+config CANYONLANDS
+	bool "Glacier"
+	help
+	  Select this to build for the Canyonlands 460EX board.
+
+config GLACIER
+	bool "Glacier"
+	help
+	  Select this to build for the Glacier 460GT board.
+
+config ARCHES
+	bool "Arches"
+	help
+	  Select this to build for the Arches dual 460GT board.
+
+endchoice
+
 endif
diff --git a/configs/arches_defconfig b/configs/arches_defconfig
index 18d0a14..60e6ef9 100644
--- a/configs/arches_defconfig
+++ b/configs/arches_defconfig
@@ -1,4 +1,4 @@
-CONFIG_SYS_EXTRA_OPTIONS="ARCHES"
 CONFIG_PPC=y
 CONFIG_4xx=y
 CONFIG_TARGET_CANYONLANDS=y
+CONFIG_ARCHES=y
diff --git a/configs/canyonlands_defconfig b/configs/canyonlands_defconfig
index 09b9ab9..37a2b4d 100644
--- a/configs/canyonlands_defconfig
+++ b/configs/canyonlands_defconfig
@@ -1,4 +1,4 @@
-CONFIG_SYS_EXTRA_OPTIONS="CANYONLANDS"
 CONFIG_PPC=y
 CONFIG_4xx=y
 CONFIG_TARGET_CANYONLANDS=y
+CONFIG_CANYONLANDS=y
diff --git a/configs/glacier_defconfig b/configs/glacier_defconfig
index 2a66bfb..436b9f8 100644
--- a/configs/glacier_defconfig
+++ b/configs/glacier_defconfig
@@ -1,4 +1,4 @@
-CONFIG_SYS_EXTRA_OPTIONS="GLACIER"
 CONFIG_PPC=y
 CONFIG_4xx=y
 CONFIG_TARGET_CANYONLANDS=y
+CONFIG_GLACIER=y
diff --git a/include/configs/canyonlands.h b/include/configs/canyonlands.h
index 7b1f368..ed790cc 100644
--- a/include/configs/canyonlands.h
+++ b/include/configs/canyonlands.h
@@ -11,6 +11,8 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#include <linux/kconfig.h>
+
 /*-----------------------------------------------------------------------
  * High Level Configuration Options
  *----------------------------------------------------------------------*/