drivers/perf: arm-pmu: Fix handling of SPI lacking "interrupt-affinity" property

drivers/perf: arm-pmu: Fix handling of SPI lacking "interrupt-affinity" property

Patch 19a469a58720 ("drivers/perf: arm-pmu: Handle per-interrupt
affinity mask") added support for partitionned PPI setups, but
inadvertently broke setups using SPIs without the "interrupt-affinity"
property (which is the case for UP platforms).

This patch restore the broken functionnality by testing whether the
interrupt is percpu or not instead of relying on the using_spi flag
that really means "SPI *and* interrupt-affinity property".

Acked-by: Mark Rutland <[email protected]>
Reported-by: Geert Uytterhoeven <[email protected]>
Tested-by: Geert Uytterhoeven <[email protected]>
Fixes: 19a469a58720 ("drivers/perf: arm-pmu: Handle per-interrupt affinity mask")
Signed-off-by: Marc Zyngier <[email protected]>
Signed-off-by: Will Deacon <[email protected]>