firmware: fix wrong memory deallocation in fw_add_devm_name()

Device resource data allocated with devres_alloc() must be deallocated
by devres_free().

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/firmware_class.c

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 894bda1..8524450 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -443,7 +443,7 @@
 		return -ENOMEM;
 	fwn->name = kstrdup_const(name, GFP_KERNEL);
 	if (!fwn->name) {
-		kfree(fwn);
+		devres_free(fwn);
 		return -ENOMEM;
 	}