regulator: add syr82x driver

Silergy SYR827/SYR828 are 2.4MHz synchronous step down DC/DC regulators,
capable of delivering up to 6A output currents.
The output voltage can be programmed from 0.7125V to 1.5V through an
I2C interface.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
add Netxeon R89 dts
ARM: decompressor: Flush tlb before swiching domain 0 to client mode

If the bootloader used a page table that is incompatible with domain 0
in client mode, and boots with the mmu on, then swithing domain 0 to
client mode causes a fault if we don't flush the tlb after updating
the page table pointer.

v2: Add ISB before loading dacr.

Signed-off-by: Arve Hjønnevåg <arve@android.com>