arm64: cpufeature: Add cpufeature for IRQ priority masking
Add a cpufeature indicating whether a cpu supports masking interrupts by priority. The feature will be properly enabled in a later patch. Signed-off-by: NJulien Thierry <julien.thierry@arm.com> Reviewed-by: NSuzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: NMark Rutland <mark.rutland@arm.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Acked-by: NMarc Zyngier <marc.zyngier@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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