x86/apic: Deinline various functions

__x2apic_disable: 178 bytes, 3 calls
__x2apic_enable: 117 bytes, 3 calls
__smp_spurious_interrupt: 110 bytes, 2 calls
__smp_error_interrupt: 208 bytes, 2 calls

Reduces code size by about 850 bytes.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/1443559022-23793-1-git-send-email-dvlasenk@redhat.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>