Bump the 17.01 tree kernel to 4.4.69. Trunk 4.4 and 17.01 4.4 have diverged, talked this
through with jow, he was okay with a clean diff against 17.01 and not a backported trunk
patch.

The following patches were applied upstream:

* 062-[1-6]-MIPS-* series
* 042-0004-mtd-bcm47xxpart-fix-parsing-first-block

Reintroduced lantiq/patches-4.4/0050-MIPS-Lantiq-Fix-cascaded-IRQ-setup, as
it was incorrectly included upstream thus dropped from LEDE, but subsequently
reverted upstream. Thanks to Kevin Darbyshire-Bryant for pointing me to it.

  Compile-tested on: ar71xx, ramips/mt7621, x86/64.

  Run-tested on: ar71xx, ramips/mt7621, x86/64.

Signed-off-by: Stijn Segers <francesco.borromini@inventati.org>

To achieve this, device tree compatible string was used as boardname and
the value of it will be checked against supported_devices list.

It should be noted that we do not distinguish between
sun5i-a13-olimex-som and sun5i-a13-olinuxino as they share the same dts
file.

The other thing is that we need to gunzip the generated firmware to do
fwtool check.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Enalbe builtin support for FAT filesystem as we need to mount boot
partition to store sysupgrade.tgz there

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Two things that need to be noted

 - There is no partition type id allocated for squashfs yet.  In the
   case of sunxi, any non-zero value should work and we keep it 83 (the
   value for ext4)
 - Remaining spare space within the rootfs partition, not the entire
   sdcard space will be formated as either f2fs or ext4 and mounted as
   overlay to serve the role of rootfs_data.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

The new Device/xxx were transformed automatically from old profiles.

Most device names are now taken from basename of the corresponding
kernel device tree file.  Device/sun5i-a13-olimex-som is an exception
because it is not explicitly supported in the kernel yet and shares the
same dts file with Device/sun5i-a13-olinuxino

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Other virtualization options are already enabled, so this is only a
small addition

Signed-off-by: Felix Fietkau <nbd@nbd.name>

CONFIG_CRYPTO_DEV_SUN4I_SS was previously set to y but did not take
effect because of the absence of CONFIG_CRYPTO_HW=y

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Unlike x86, kvm for arm has to be built into the kernel.  The kernel
config was prepared with the following command

    make kernel_menuconfig CONFIG_TARGET=platform

Then enable ARM_LPAE, VIRTUALIZATION, KVM in that order

Other config changes are done by the build system.  The following text
tries to explain some of them, for archive purposes probably...

 - BUILD_BIN2C.  It was dropped probably because the prompt is empty and
   no other config option selects it.  bin2c is a host executable for
   converting binary content to a piece of c code for inclusion
 - CRYPTO_DEV_SUN4I_SS.  It was dropped because the dependency CRYPTO_HW
   was not enabled.  Setting that aside, packaging it as a loadbable
   module in lieu of other sunxi specific modules seems more appropriate
 - PGTABLE_LEVELS.  It was changed from 2 to 3 because 3 is the default
   when ARM_LPAE is enabled
 - HAVE_KERNEL_GZIP, etc..  These are enabled in generic config
 - SCHED_INFO, ZLIB_INFLATE.  These were dropped probably for the same
   reason as for BUILD_BIN2C

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>