plat: imx8mq: Only keep IRQ 32 unmasked

Only IRQ 32 (SPI 0) needs to be kept unmasked, not everything divisible
by 32.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Change-Id: I286b925eead89218cfeddd82f53a634f3447d212
1 file changed