edac: sb_edac: Add it to the building system

Some changes on it were required due to changeset cd90cc84c6bf0, that
changed the glue with the MCE logic.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index b06a9b1..196a63d 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -28,6 +28,7 @@
 obj-$(CONFIG_EDAC_I5400)		+= i5400_edac.o
 obj-$(CONFIG_EDAC_I7300)		+= i7300_edac.o
 obj-$(CONFIG_EDAC_I7CORE)		+= i7core_edac.o
+obj-$(CONFIG_EDAC_SBRIDGE)		+= sb_edac.o
 obj-$(CONFIG_EDAC_E7XXX)		+= e7xxx_edac.o
 obj-$(CONFIG_EDAC_E752X)		+= e752x_edac.o
 obj-$(CONFIG_EDAC_I82443BXGX)		+= i82443bxgx_edac.o