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irqchip/gic: Kconfig the number of instances
There is currently a hack in the GIC driver making it possible to pass the number of GIC instances from the platform-specific include files and thus override the variable MAX_GIC_NR. With multiplatform deployments, this will not work as we need to get rid of the platform-specific include files. It turns out that this feature is only used by the RealView platform which has a cascaded GIC. So move the configuration to Kconfig and bump to 2 instances if we're building for the RealView. The include file hacks can then be removed. Tested on the ARM PB11MPCore with its cascaded GIC. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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