edac: add support for Calxeda highbank memory controller

Add support for memory controller on Calxeda Highbank platforms. Highbank
platforms support a single 4GB mini-DIMM with 1-bit correction and 2-bit
detection.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index 196a63d..44f2044 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -55,3 +55,5 @@
 obj-$(CONFIG_EDAC_AMD8131)		+= amd8131_edac.o
 
 obj-$(CONFIG_EDAC_TILE)			+= tile_edac.o
+
+obj-$(CONFIG_EDAC_HIGHBANK_MC)	+= highbank_mc_edac.o