amd64_edac: Cleanup NBCFG handling

The fact whether we are chipkill capable or not does not have any
bearing when computing the channel index on a ganged DCT configuration
so remove that. Also, simplify debug statements. Finally, remove old
error injection leftovers, while at it.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index fc609d1..6c52736 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -246,9 +246,9 @@
  */
 #define NBCTL				0x40
 
-#define K8_NBCFG			0x44
-#define K8_NBCFG_CHIPKILL		BIT(23)
-#define K8_NBCFG_ECC_ENABLE		BIT(22)
+#define NBCFG				0x44
+#define NBCFG_CHIPKILL			BIT(23)
+#define NBCFG_ECC_ENABLE		BIT(22)
 
 #define K8_NBSL				0x48
 
@@ -420,9 +420,6 @@
 	/* x4 or x8 syndromes in use */
 	u8 syn_type;
 
-	/* temp storage for when input is received from sysfs */
-	struct err_regs ctl_error_info;
-
 	/* place to store error injection parameters prior to issue */
 	struct error_injection injection;