MIPS: Fix build error for non-malta VSMP kernel

VSMP kernel build for non-malta platforms fails with following error

  LD      init/built-in.o
  LD      .tmp_vmlinux1
arch/mips/built-in.o: In function `vsmp_init_secondary':
smp-mt.c:(.cpuinit.text+0x23cc): undefined reference to `gic_present'
smp-mt.c:(.cpuinit.text+0x23d0): undefined reference to `gic_present'
make: *** [.tmp_vmlinux1] Error 1

gic_present variable is declared only if IRQ_GIC is selected.
Signed-off-by: NAnoop P A <anoop.pa@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/2039/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

arch/mips/kernel/smp-mt.c

@@ -150,6 +150,7 @@ static void vsmp_send_ipi_mask(const struct cpumask *mask, unsigned int action)
 
 static void __cpuinit vsmp_init_secondary(void)
 {
+#ifdef CONFIG_IRQ_GIC
 	extern int gic_present;
 
 	/* This is Malta specific: IPI,performance and timer interrupts */
@@ -157,6 +158,7 @@ static void __cpuinit vsmp_init_secondary(void)
 		change_c0_status(ST0_IM, STATUSF_IP3 | STATUSF_IP4 |
 					 STATUSF_IP6 | STATUSF_IP7);
 	else
+#endif
 		change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 |
 					 STATUSF_IP6 | STATUSF_IP7);
 }