EDAC: Constify attribute_group structures

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with
const attribute_group. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
CC: linux-edac@vger.kernel.org
Link: http://lkml.kernel.org/r/776cb8265509054abd01b0b551624cc0da3b88e7.1499078335.git.arvind.yadav.cs@gmail.com
Signed-off-by: Borislav Petkov <bp@suse.de>

drivers/edac/edac_mc_sysfs.c

@@ -287,7 +287,7 @@ static struct attribute *csrow_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group csrow_attr_grp = {
+static const struct attribute_group csrow_attr_grp = {
 	.attrs	= csrow_attrs,
 };
 
@@ -627,7 +627,7 @@ static struct attribute *dimm_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group dimm_attr_grp = {
+static const struct attribute_group dimm_attr_grp = {
 	.attrs	= dimm_attrs,
 };
 
@@ -902,7 +902,7 @@ static umode_t mci_attr_is_visible(struct kobject *kobj,
 	return mode;
 }
 
-static struct attribute_group mci_attr_grp = {
+static const struct attribute_group mci_attr_grp = {
 	.attrs	= mci_attrs,
 	.is_visible = mci_attr_is_visible,
 };

drivers/edac/i7core_edac.c

@@ -1079,7 +1079,7 @@ static struct attribute *i7core_addrmatch_attrs[] = {
 	NULL
 };
 
-static struct attribute_group addrmatch_grp = {
+static const struct attribute_group addrmatch_grp = {
 	.attrs	= i7core_addrmatch_attrs,
 };
 
@@ -1110,7 +1110,7 @@ static struct attribute *i7core_udimm_counters_attrs[] = {
 	NULL
 };
 
-static struct attribute_group all_channel_counts_grp = {
+static const struct attribute_group all_channel_counts_grp = {
 	.attrs	= i7core_udimm_counters_attrs,
 };