This commit introduces a new interrupt controller driver used
for NXP's IRQ_STEER IP.
Apart from introducing the driver itself, this commit contains
the following changes:
1) Switch i.MX8MP to using the XTENSA core interrupt
controller instead of the dummy irqsteer one.
* this is required because the binding for the
irqsteer driver is no longer a dummy one
(since it's being used by the irqsteer driver).
As such, to avoid having problems, switch to
using another dummy binding.
2) Modify the irqsteer dummy binding such that it
serves the IRQ_STEER driver's needs.
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Add mailbox and interrupt-controller nodes used for
inter-process communication.
Add also the dt binding for the interrupt-controller.
For now, this is used just to fix some compile errors,
since the mailbox requires an interrupt-controller.
For DSP, we have a direct interrupt line to the core.
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
