irqchip: Add driver for imx-irqsteer controller

The irqsteer block is a interrupt multiplexer/remapper found on the
i.MX8 line of SoCs.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
3 files changed