s390/con3215: Remove spurious NULL in attribute_group definition

JIRA: https://issues.redhat.com/browse/RHEL-85241
Upstream Status: b22fd46

commit b22fd46
Author: Thomas Weißschuh <linux@weissschuh.net>
Date:   Mon Nov 18 16:02:48 2024 +0100

    s390/con3215: Remove spurious NULL in attribute_group definition

    This NULL value is most-likely a copy-paste error from an array
    definition. So far the NULL didn't have any effect.
    As there will be a union in struct attribute_group at this location,
    it will trigger a compiler warning.

    Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
    Link: https://lore.kernel.org/r/20241118-sysfs-const-attribute_group-fixes-v1-2-48e0b0ad8cba@weissschuh.net
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Myron Stowe <mstowe@redhat.com>

Author: Myron Stowe

drivers/s390/char/con3215.c

@@ -803,7 +803,6 @@ static struct attribute *con3215_drv_attrs[] = {
 
 static struct attribute_group con3215_drv_attr_group = {
 	.attrs = con3215_drv_attrs,
-	NULL,
 };
 
 static const struct attribute_group *con3215_drv_attr_groups[] = {