1. Back ported commit from master

Adding support to compile ARM architecture (sonic-net#102)

2. Added support for marvell Armada A7020 Arm64

Signed-off-by: Antony Rheneus <arheneus@marvell.com>

Author: antony-rheneus

Makefile

@@ -8,10 +8,11 @@ KVERSION ?= $(KVERSION_SHORT)-amd64
 KERNEL_VERSION ?= 4.9.189
 KERNEL_SUBVERSION ?= 3+deb9u2
 kernel_procure_method ?= build
+CONFIGURED_ARCH ?= amd64
 
 LINUX_HEADER_COMMON = linux-headers-$(KVERSION_SHORT)-common_$(KERNEL_VERSION)-$(KERNEL_SUBVERSION)_all.deb
-LINUX_HEADER_AMD64 = linux-headers-$(KVERSION)_$(KERNEL_VERSION)-$(KERNEL_SUBVERSION)_amd64.deb
-LINUX_IMAGE = linux-image-$(KVERSION)_$(KERNEL_VERSION)-$(KERNEL_SUBVERSION)_amd64.deb
+LINUX_HEADER_AMD64 = linux-headers-$(KVERSION)_$(KERNEL_VERSION)-$(KERNEL_SUBVERSION)_$(CONFIGURED_ARCH).deb
+LINUX_IMAGE = linux-image-$(KVERSION)_$(KERNEL_VERSION)-$(KERNEL_SUBVERSION)_$(CONFIGURED_ARCH).deb
 
 MAIN_TARGET = $(LINUX_HEADER_COMMON)
 DERIVED_TARGETS = $(LINUX_HEADER_AMD64) $(LINUX_IMAGE)
@@ -73,9 +74,13 @@ $(addprefix $(DEST)/, $(MAIN_TARGET)): $(DEST)/% :
 	debian/bin/gencontrol.py
 
 	# generate linux build file for amd64_none_amd64
+	fakeroot make -f debian/rules.gen setup_armhf_none_armmp
+	fakeroot make -f debian/rules.gen setup_arm64_none
 	fakeroot make -f debian/rules.gen setup_amd64_none_amd64
 
 	# Applying patches and configuration changes
+	git add debian/build/build_armhf_none_armmp/.config -f
+	git add debian/build/build_arm64_none_arm64/.config -f
 	git add debian/build/build_amd64_none_amd64/.config -f
 	git add debian/config.defines.dump -f
 	git add debian/control -f
@@ -89,7 +94,11 @@ $(addprefix $(DEST)/, $(MAIN_TARGET)): $(DEST)/% :
 
 	# Building a custom kernel from Debian kernel source
 	DO_DOCS=False fakeroot make -f debian/rules -j $(shell nproc) binary-indep
-	fakeroot make -f debian/rules.gen -j $(shell nproc) binary-arch_amd64_none
+ifeq ($(CONFIGURED_ARCH), armhf)
+	fakeroot make -f debian/rules.gen -j $(shell nproc) binary-arch_$(CONFIGURED_ARCH)_none_armmp
+else
+	fakeroot make -f debian/rules.gen -j $(shell nproc) binary-arch_$(CONFIGURED_ARCH)_none
+endif
 	popd
 
 ifneq ($(DEST),)

patch/0001-Marvell-support-for-armada7020-on-LK4.9.168.patch

@@ -10260,7 +10260,7 @@ index 00000000..4e09824
 +obj-$(CONFIG_MTD_NAND_BCH)		+= nand_bch.o
 +obj-$(CONFIG_MTD_SM_COMMON) 		+= sm_common.o
 +
-+obj-$(CONFIG_MTD_NAND_CAFE)		+= cafe_nand.o
++#obj-$(CONFIG_MTD_NAND_CAFE)		+= cafe_nand.o
 +obj-$(CONFIG_MTD_NAND_AMS_DELTA)	+= ams-delta.o
 +obj-$(CONFIG_MTD_NAND_DENALI)		+= denali.o
 +obj-$(CONFIG_MTD_NAND_DENALI_PCI)	+= denali_pci.o
@@ -10274,7 +10274,7 @@ index 00000000..4e09824
 +obj-$(CONFIG_MTD_NAND_DOCG4)		+= docg4.o
 +obj-$(CONFIG_MTD_NAND_FSMC)		+= fsmc_nand.o
 +obj-$(CONFIG_MTD_NAND_SHARPSL)		+= sharpsl.o
-+obj-$(CONFIG_MTD_NAND_NANDSIM)		+= nandsim.o
++#obj-$(CONFIG_MTD_NAND_NANDSIM)		+= nandsim.o
 +obj-$(CONFIG_MTD_NAND_CS553X)		+= cs553x_nand.o
 +obj-$(CONFIG_MTD_NAND_NDFC)		+= ndfc.o
 +obj-$(CONFIG_MTD_NAND_ATMEL)		+= atmel/