WIP: xtensa: add Three Core HiFi-2 MX Variant.

Signed-off-by: Pete Delaney <piet@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
WIP: xtensa: add shabu core

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
WIP: xtensa: SMP clockevent

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: extract PIC into drivers/irqchip

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: add MX irqchip

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
WIP: xtensa: add SMP support

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
WIP: xtensa: implement CPU hotplug

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
WIP

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
WIP: xtensa: SMP debug on real LX200

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: provide HAVE_IRQ_TIME_ACCOUNTING symbol

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>