HID: roccat: Add "Roccat Talk" support for koneplus

Added binary sysfs attribute to support new functionality the manufacturer
added to koneplus.

Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c
index 5b640a7..23cdb44 100644
--- a/drivers/hid/hid-roccat-koneplus.c
+++ b/drivers/hid/hid-roccat-koneplus.c
@@ -240,6 +240,14 @@
 	return real_size;
 }
 
+static ssize_t koneplus_sysfs_write_talk(struct file *fp,
+		struct kobject *kobj, struct bin_attribute *attr, char *buf,
+		loff_t off, size_t count)
+{
+	return koneplus_sysfs_write(fp, kobj, buf, off, count,
+			sizeof(struct koneplus_talk), KONEPLUS_USB_COMMAND_TALK);
+}
+
 static ssize_t koneplus_sysfs_write_macro(struct file *fp,
 		struct kobject *kobj, struct bin_attribute *attr, char *buf,
 		loff_t off, size_t count)
@@ -557,6 +565,11 @@
 		.size = sizeof(struct koneplus_macro),
 		.write = koneplus_sysfs_write_macro
 	},
+	{
+		.attr = { .name = "talk", .mode = 0220 },
+		.size = sizeof(struct koneplus_talk),
+		.write = koneplus_sysfs_write_talk
+	},
 	__ATTR_NULL
 };