hmp: fix qemu crash due to ioapic state dump w/ split irqchip

hmp: fix qemu crash due to ioapic state dump w/ split irqchip

The qemu will crash when info ioapic through hmp if irqchip
is split. Below message is splat:

KVM_GET_IRQCHIP failed: Unknown error -6

This patch fix it by dumping the ioapic state from the qemu
emulated ioapic if irqchip is split.

Cc: Paolo Bonzini <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Eduardo Habkost <[email protected]>
Signed-off-by: Wanpeng Li <[email protected]>
Message-Id: <1474602456[email protected]>
Reviewed-by: Peter Xu <[email protected]>
Message-ID: <20160923090824[email protected]>
Signed-off-by: Dr. David Alan Gilbert <[email protected]>