irqchip/mips-gic: Don't touch vl_map if a local interrupt is not routable

When a GIC local interrupt is not routable, it's vl_map will be used
to control some internal states for core (providing IPTI, IPPCI, IPFDC
input signal for core). Overriding it will interfere core's intetrupt
controller.

Do not touch vl_map if a local interrupt is not routable, we are not
going to remap it.

Before dd098a0e0319 (" irqchip/mips-gic: Get rid of the reliance on
irq_cpu_online()"), if a local interrupt is not routable, then it won't
be requested from GIC Local domain, and thus gic_all_vpes_irq_cpu_online
won't be called for that particular interrupt.

Fixes: dd098a0e0319 (" irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()")
Cc: [email protected]
Signed-off-by: Jiaxun Yang <[email protected]>
Reviewed-by: Serge Semin <[email protected]>
Tested-by: Serge Semin <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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