x86: Make flat_init_apic_ldr() available

Allow flat_init_apic_ldr() to be used outside the compilation
unit for similar APIC implementations.

Signed-off-by: Daniel J Blueman <[e-mail]>
Cc: Steffen Persvold <[e-mail]>
Cc: Jesse Barnes <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/include/asm/apic_flat_64.h

···
+#ifndef _ASM_X86_APIC_FLAT_64_H
+#define _ASM_X86_APIC_FLAT_64_H
+
+extern void flat_init_apic_ldr(void);
+
+#endif
+

arch/x86/kernel/apic/apic_flat_64.c

···
  * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
  * document number 292116).  So here it goes...
  */
-static void flat_init_apic_ldr(void)
+void flat_init_apic_ldr(void)
 {
 	unsigned long val;
 	unsigned long num, id;