bcm4908: backport DT patch adding Ethernet MAC address

This tells OS (Linux) where from MAC should be read (bootloader MTD
partition).

Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/bcm4908/patches-5.4/032-v5.13-0011-arm64-dts-broadcom-bcm4908-add-Ethernet-MAC-addr.patch

@@ -0,0 +1,82 @@
+From 9f01f5cdb548352418b34ce77db02a560fe2913b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
+Date: Mon, 29 Mar 2021 17:45:14 +0200
+Subject: [PATCH] arm64: dts: broadcom: bcm4908: add Ethernet MAC addr
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+On most BCM4908 devices MAC address can be read from the bootloader
+binary section containing device settings. Use NVMEM to describe that.
+
+Signed-off-by: Rafał Miłecki <[email protected]>
+Signed-off-by: Florian Fainelli <[email protected]>
+---
+ .../broadcom/bcm4908/bcm4906-netgear-r8000p.dts    | 14 ++++++++++++++
+ .../broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts    | 14 ++++++++++++++
+ 2 files changed, 28 insertions(+)
+
+--- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts
++++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts
+@@ -74,6 +74,11 @@
+ 	};
+ };
+ 
++&enet {
++	nvmem-cells = <&base_mac_addr>;
++	nvmem-cell-names = "mac-address";
++};
++
+ &usb_phy {
+ 	brcm,ioc = <1>;
+ 	status = "okay";
+@@ -130,8 +135,17 @@
+ 		#size-cells = <1>;
+ 
+ 		partition@0 {
++			compatible = "nvmem-cells";
+ 			label = "cferom";
+ 			reg = <0x0 0x100000>;
++
++			#address-cells = <1>;
++			#size-cells = <1>;
++			ranges = <0 0x0 0x100000>;
++
++			base_mac_addr: mac@106a0 {
++				reg = <0x106a0 0x6>;
++			};
+ 		};
+ 
+ 		partition@100000 {
+--- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts
++++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts
+@@ -44,6 +44,11 @@
+ 	};
+ };
+ 
++&enet {
++	nvmem-cells = <&base_mac_addr>;
++	nvmem-cell-names = "mac-address";
++};
++
+ &usb_phy {
+ 	brcm,ioc = <1>;
+ 	status = "okay";
+@@ -128,8 +133,17 @@
+ 		#size-cells = <1>;
+ 
+ 		partition@0 {
++			compatible = "nvmem-cells";
+ 			label = "cferom";
+ 			reg = <0x0 0x100000>;
++
++			#address-cells = <1>;
++			#size-cells = <1>;
++			ranges = <0 0x0 0x100000>;
++
++			base_mac_addr: mac@106a0 {
++				reg = <0x106a0 0x6>;
++			};
+ 		};
+ 
+ 		partition@100000 {