bcm53xx: drop patch for downstream swconfig-based b53

It isn't used anymore so there is no need to hack CPU port. Upstream
(DSA-based) b53 also supports all switch ports just fine.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/bcm53xx/patches-5.10/700-b53-add-hacky-CPU-port-fixes-for-devices-not-using-p.patch

@@ -1,53 +0,0 @@
-From 4abdde3ad6bc0b3b157c4bf6ec0bf139d11d07e8 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
-Date: Wed, 13 May 2015 14:13:28 +0200
-Subject: [PATCH] b53: add hacky CPU port fixes for devices not using port 5
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
----
- drivers/net/phy/b53/b53_common.c | 6 ++++++
- 1 file changed, 6 insertions(+)
-
---- a/drivers/net/phy/b53/b53_common.c
-+++ b/drivers/net/phy/b53/b53_common.c
-@@ -28,6 +28,7 @@
- #include <linux/of.h>
- #include <linux/of_net.h>
- #include <linux/platform_data/b53.h>
-+#include <linux/of.h>
- 
- #include "b53_regs.h"
- #include "b53_priv.h"
-@@ -1587,6 +1588,29 @@ static int b53_switch_init(struct b53_de
- 			return ret;
- 	}
- 
-+	/* Set correct CPU port */
-+	if (of_machine_is_compatible("asus,rt-ac87u"))
-+		sw_dev->cpu_port = 7;
-+	else if (of_machine_is_compatible("netgear,r7900"))
-+		sw_dev->cpu_port = 8;
-+	else if (of_machine_is_compatible("netgear,r8000"))
-+		sw_dev->cpu_port = 8;
-+	else if (of_machine_is_compatible("netgear,r8500"))
-+		sw_dev->cpu_port = 8;
-+
-+	/* Enable extra ports */
-+	if (of_machine_is_compatible("tenda,ac9"))
-+		dev->enabled_ports |= BIT(5);
-+
-+	/*
-+	 * Workaround for devices using port 8 (connected to the 3rd iface).
-+	 * For some reason it doesn't work (no packets on eth2).
-+	 */
-+	if (of_machine_is_compatible("netgear,r7900") ||
-+	    of_machine_is_compatible("netgear,r8000") ||
-+	    (of_machine_is_compatible("linksys,panamera") && dev->chip_id == BCM53012_DEVICE_ID))
-+		sw_dev->cpu_port = 5;
-+
- 	dev->enabled_ports |= BIT(sw_dev->cpu_port);
- 	sw_dev->ports = fls(dev->enabled_ports);
-