ppc4xx: Add AMCC Glacier 406GT eval board support

This patch adds support for the AMCC Glacier 460GT eval board.
The main difference to the Canyonlands board are listed here:

- 4 ethernet ports instead of 2
- no SATA port
- no USB port

Currently EMAC2+3 are not working. This will be fixed in a later
release.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/Makefile b/Makefile
index 4255cf5..744abae 100644
--- a/Makefile
+++ b/Makefile
@@ -1172,8 +1172,13 @@
 CANBT_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) ppc ppc4xx canbt esd
 
-canyonlands_config:	unconfig
-	@$(MKCONFIG) $(@:_config=) ppc ppc4xx canyonlands amcc
+# Canyonlands & Glacier use different U-Boot images
+canyonlands_config \
+glacier_config:	unconfig
+	@mkdir -p $(obj)include
+	@echo "#define CONFIG_$$(echo $(subst ,,$(@:_config=)) | \
+		tr '[:lower:]' '[:upper:]')" >$(obj)include/config.h
+	@$(MKCONFIG) -n $@ -a canyonlands ppc ppc4xx canyonlands amcc
 
 canyonlands_nand_config:	unconfig
 	@mkdir -p $(obj)include $(obj)board/amcc/canyonlands