x86: apic/io_apic.c define msi_ir_chip and ir_ioapic_chip all the time

move out msi_ir_chip and ir_ioapic_chip from CONFIG_INTR_REMAP shadow

Fix:
 arch/x86/kernel/apic/io_apic.c:1431: warning: ‘msi_ir_chip’ defined but not used

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>