bcm53xx: backport patch adding ARCH_BCM_53573 symbol

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

target/linux/bcm53xx/config-4.4

@@ -3,6 +3,7 @@ CONFIG_ARCH_BCM=y
 # CONFIG_ARCH_BCM_21664 is not set
 # CONFIG_ARCH_BCM_281XX is not set
 CONFIG_ARCH_BCM_5301X=y
+CONFIG_ARCH_BCM_53573=y
 # CONFIG_ARCH_BCM_63XX is not set
 # CONFIG_ARCH_BCM_CYGNUS is not set
 CONFIG_ARCH_BCM_IPROC=y

target/linux/bcm53xx/patches-4.4/043-0001-ARM-BCM53573-Initial-support-for-Broadcom-BCM53573-S.patch

@@ -0,0 +1,61 @@
+From 4ebd50472899eb07d5dfc24f2015dce6fe3c5cb8 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Sun, 21 Aug 2016 19:01:38 +0200
+Subject: [PATCH] ARM: BCM53573: Initial support for Broadcom BCM53573 SoCs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+BCM53573 series is a new family with embedded wireless. By marketing
+people it's sometimes called Northstar but it uses different CPU and has
+different architecture so we need a new symbol for it.
+Fortunately it shares some peripherals with other iProc based SoCs so we
+will be able to reuse some drivers/bindings.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Jon Mason <jon.mason@broadcom.com>
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+---
+ MAINTAINERS               |  7 +++++++
+ arch/arm/mach-bcm/Kconfig | 14 ++++++++++++++
+ 2 files changed, 21 insertions(+)
+
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -2338,6 +2338,13 @@ F:	arch/arm/mach-bcm/bcm_5301x.c
+ F:	arch/arm/boot/dts/bcm5301x.dtsi
+ F:	arch/arm/boot/dts/bcm470*
+ 
++BROADCOM BCM53573 ARM ARCHITECTURE
++M:	Rafał Miłecki <rafal@milecki.pl>
++L:	linux-arm-kernel@lists.infradead.org
++S:	Maintained
++F:	arch/arm/boot/dts/bcm53573*
++F:	arch/arm/boot/dts/bcm47189*
++
+ BROADCOM BCM63XX ARM ARCHITECTURE
+ M:	Florian Fainelli <f.fainelli@gmail.com>
+ L:	linux-arm-kernel@lists.infradead.org
+--- a/arch/arm/mach-bcm/Kconfig
++++ b/arch/arm/mach-bcm/Kconfig
+@@ -141,6 +141,20 @@ config ARCH_BCM2835
+ 	  This enables support for the Broadcom BCM2835 SoC. This SoC is
+ 	  used in the Raspberry Pi and Roku 2 devices.
+ 
++config ARCH_BCM_53573
++	bool "Broadcom BCM53573 SoC series support"
++	depends on ARCH_MULTI_V7
++	select ARCH_BCM_IPROC
++	select HAVE_ARM_ARCH_TIMER
++	help
++	  BCM53573 series is set of SoCs using ARM Cortex-A7 CPUs with wireless
++	  embedded in the chipset.
++	  This SoC line is mostly used in home routers and is some cheaper
++	  alternative for Northstar family.
++
++	  The base chip is BCM53573 and there are some packaging modifications
++	  like BCM47189 and BCM47452.
++
+ config ARCH_BCM_63XX
+ 	bool "Broadcom BCM63xx DSL SoC" if ARCH_MULTI_V7
+ 	depends on MMU

target/linux/bcm53xx/patches-4.4/130-ARM-BCM5301X-Add-basic-dts-for-BCM53573-based-Tenda-.patch

@@ -32,8 +32,8 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
 +F:	arch/arm/boot/dts/bcm53573*
 +F:	arch/arm/boot/dts/bcm47189*
  
- BROADCOM BCM63XX ARM ARCHITECTURE
+ BROADCOM BCM53573 ARM ARCHITECTURE
- M:	Florian Fainelli <f.fainelli@gmail.com>
+ M:	Rafał Miłecki <rafal@milecki.pl>
 --- a/arch/arm/boot/dts/Makefile
 +++ b/arch/arm/boot/dts/Makefile
 @@ -77,6 +77,7 @@ dtb-$(CONFIG_ARCH_BCM_5301X) += \