x86: fix function definitions after: x86: apic - introduce imcr_ helpers

The patch "introduce imcr_ helpers" introduced good comments, but
also a few new compile warnings. This fixes the function definitions
to have a 'void' return type.

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090413153924.GA20287@mailshack.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/apic/apic.c

@@ -106,15 +106,15 @@ static int enabled_via_apicbase;
  * the BIOS or the operating system must switch out of
  * PIC Mode by changing the IMCR.
  */
-static inline imcr_pic_to_apic(void)
+static inline void imcr_pic_to_apic(void)
 {
 	/* select IMCR register */
 	outb(0x70, 0x22);
 	/* NMI and 8259 INTR go through APIC */
 	outb(0x01, 0x23);
 }
 
-static inline imcr_apic_to_pic(void)
+static inline void imcr_apic_to_pic(void)
 {
 	/* select IMCR register */
 	outb(0x70, 0x22);