irqchip/apple-aic: APPLE_AIC should depend on ARCH_APPLE

The Apple Interrupt Controller is only present on Apple Silicon SoCs.
Hence add a dependency on ARCH_APPLE, to prevent asking the user about
this driver when configuring a kernel without Apple Silicon SoC support.

Drop the default, as ARCH_APPLE already selects APPLE_AIC.

Fixes: 76cde26 ("irqchip/apple-aic: Add support for the Apple Interrupt Controller")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/f37e8daea37d50651d2164b0b3dad90780188548.1618316398.git.geert+renesas@glider.be

drivers/irqchip/Kconfig

@@ -596,7 +596,7 @@ config IRQ_IDT3243X
 config APPLE_AIC
 	bool "Apple Interrupt Controller (AIC)"
 	depends on ARM64
-	default ARCH_APPLE
+	depends on ARCH_APPLE || COMPILE_TEST
 	help
 	  Support for the Apple Interrupt Controller found on Apple Silicon SoCs,
 	  such as the M1.