linux-yocto: Replace branch names in custom preempt-rt recipes

Change Kernel branch name for linux-yocto-custom-rt:
- from "lsi_rt_axm55xx" to "standard/preempt-rt/lsi/axm55xx" for axm55xx
  machine
- from "lsi_rt_acp34xx" to "standard/preempt-rt/lsi/acp34xx" for acp34xx
  machine

Signed-off-by: Paul Butler <paul.butler@windriver.com>
axm5500sim: Corrected file name axm5500sim.inc

Signed-off-by: Paul Butler <paul.butler@windriver.com>
README: Updating with additional machine info

Signed-off-by: Paul Butler <paul.butler@windriver.com>
linux-yocto: Recipe updates to use kernel meta branch cfg/scc fragments

- Modified recipes to use "meta" branch for kernel build
- Removed defconfigs
- Update Serial Console settings for axm5500sim
- Add "ext3" feature to MACHINE_FEATURE

Signed-off-by: David Mercado <david.mercado@windriver.com>
Signed-off-by: Paul Butler <paul.butler@windriver.com>
u-boot-lsi: Add recipes-bsp/u-boot recipes for u-boot-lsi build

- Add initial recipe for u-boot-lsi which will fetch a specific
u-boot version optimized for axm5500sim and other LSI machines.
- Adapt axm5500sim conf machine to use u-boot-lsi as bootloader.

Signed-off-by: Paul Butler <paul.butler@windriver.com>
linux-yocto: Recipe updates for 7.8.1.7 Kernel tag

- Updates to custom build recipes for 7.8.1.7 tag
- Removed unnecessary inc files that only had a branch name
- Updated defconfigs for 7.8.1.7 kernel tag

Signed-off-by: Paul Butler <paul.butler@windriver.com>
linux-yocto: Recipe updates for 7.8.1.8 Kernel tag

- Updates to custom build recipes for 7.8.1.8 kernel tag.
- Removed ssh protocol access to github. Users without github accounts
and/or access to private groups should be able to build now.

Signed-off-by: Paul Butler <paul.butler@windriver.com>
u-boot-lsi: Update SRCREV to tag 5.8.1.10

Signed-off-by: Paul Butler <paul.butler@windriver.com>
core-image-tiny: Add receipe for new rootfs image type

Add receipe for for core-image-tiny ROOTFS type and related packagegroup
receipes: packagegroup-core-tiny-boot.bb and packagegroup-core-tiny.bb.notused

Update conf/layer.conf:
- Add "core" to the list of configured layers (BBFILE_COLLECTIONS)
- Define the parent directory of the OpenEmbedded Core Metadata layer
(COREBASE)
- Define the list of recipes that are completely stable and will never
change (SIGGEN_EXCLUDERECIPES_ABISAFE)

Signed-off-by: Paul Butler <paul.butler@windriver.com>
axm5500: adding support for new machine type

- Add new machine configuration file for axm5500
- Add new u-boot recipe for emulation
The new machine type (axm5500) provides support for building
u-boot for both the emulation and asic flavors. The u-boot.bin
and u-boot-spl.bin images for both emulation and asic versions
are generated.
- Update SRCREV for u-boot-lsi to tag 5.8.1.12
- Define compatible machines: axm5500sim, axm5500, elpaso (acp34xx)
- Update SRCREV for linux-yocto-custom-rt to 7.8.1.9
- Add standard and preemt-rt defconfig files for axm5500 machine

Signed-off-by: Paul Butler <paul.butler@windriver.com>
core-image-tiny: Add additional utilities/packages

For core-image-tiny add in related packagegroup some new
utilities/packages: grep, sed, kmod, initscripts.

Signed-off-by: Paul Butler <paul.butler@windriver.com>
sysvinit: Add initial receipe and scripts

Signed-off-by: Paul Butler <paul.butler@windriver.com>
linux-yocto/u-boot-lsi: Update SRCREV to tags 7.8.1.10 and 5.8.1.14

Signed-off-by: Paul Butler <paul.butler@windriver.com>
linux-yocto: Replace branch names in Kernel recipes

Change Kernel branch name for linux-yocto:
- from "standard/lsi" to "standard/axxia/base" for standard
- from "standard/preempt-rt/lsi" to "standard/preempt-rt/axxia/base"
for preempt-rt

Signed-off-by: Paul Butler <paul.butler@windriver.com>