Snapshot 2 of LTSI-NG-v4.0 for Renesas SoCs

LTS Base
* v4.0.6

Backports of the following components to their standard as of v4.1:
* ak4642
* cpg
* gpio-rcar
* i2c-rcar
* irq-renesas-irqc
* mach-shmobile
* pci-rcar-gen2
* pcie-rcar
* phy-rcar-gen2
* phy-rcar-gen2-usb
* pinctrl
* rcar-du
* rcar-snd
* rcar-vin
* rspi
* sh-cmt
* sh-drivers
* sh-eth
* sh-mmcif
* sh-mobile-sdhi
* sh-msiof
* sh-pfc
* sh-sci
* sh-tmu
* shdma
* simple-pm-bus
* usbhs

Selected backports of the following to provide dependencies for the above:
* dmaengine-selected
* drm-selected
* gic-selected
* of-selected
Merge tag 'v4.0.6' into backport/v4.0.6/snapshot

This is the 4.0.6 stable release