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: generic clockevents

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: fix arch spinlock function names

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: fix __delay for small loop count

Avoid __delay counter underflow for loop counts < 2.

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

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