bmips: backport b53 spi device tree patch

This patch has been accepted for linux v5.13.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

target/linux/bmips/patches-5.10/045-v5.13-net-dsa-b53-spi-allow-device-tree-probing.patch

@@ -0,0 +1,41 @@
+From 6d16eadab6db0c1d61e59fee7ed1ecc2d10269be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <[email protected]>
+Date: Mon, 15 Mar 2021 15:14:23 +0100
+Subject: [PATCH] net: dsa: b53: spi: allow device tree probing
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Add missing of_match_table to allow device tree probing.
+
+Signed-off-by: Álvaro Fernández Rojas <[email protected]>
+Signed-off-by: David S. Miller <[email protected]>
+---
+ drivers/net/dsa/b53/b53_spi.c | 13 +++++++++++++
+ 1 file changed, 13 insertions(+)
+
+--- a/drivers/net/dsa/b53/b53_spi.c
++++ b/drivers/net/dsa/b53/b53_spi.c
+@@ -324,9 +324,22 @@ static int b53_spi_remove(struct spi_dev
+ 	return 0;
+ }
+ 
++static const struct of_device_id b53_spi_of_match[] = {
++	{ .compatible = "brcm,bcm5325" },
++	{ .compatible = "brcm,bcm5365" },
++	{ .compatible = "brcm,bcm5395" },
++	{ .compatible = "brcm,bcm5397" },
++	{ .compatible = "brcm,bcm5398" },
++	{ .compatible = "brcm,bcm53115" },
++	{ .compatible = "brcm,bcm53125" },
++	{ .compatible = "brcm,bcm53128" },
++	{ /* sentinel */ }
++};
++
+ static struct spi_driver b53_spi_driver = {
+ 	.driver = {
+ 		.name	= "b53-switch",
++		.of_match_table = b53_spi_of_match,
+ 	},
+ 	.probe	= b53_spi_probe,
+ 	.remove	= b53_spi_remove,