MIPS: Move 'gic_present' to common location.

Move the global variable 'gic_present' to be defined in the file
'arch/mips/kernel/irq-gic.c' instead of defining it individually
for each platform making use of the GIC. Also change the type to
be an unsigned integer instead of signed.
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>

arch/mips/include/asm/gic.h

@@ -359,7 +359,7 @@ struct gic_shared_intr_map {
 /* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */
 #define GIC_PIN_TO_VEC_OFFSET	(1)
 
-extern int gic_present;
+extern unsigned int gic_present;
 extern unsigned long _gic_base;
 extern unsigned int gic_irq_base;
 extern unsigned int gic_irq_flags[];

arch/mips/kernel/irq-gic.c

@@ -19,6 +19,7 @@
 #include <linux/hardirq.h>
 #include <asm-generic/bitops/find.h>
 
+unsigned int gic_present;
 unsigned long _gic_base;
 unsigned int gic_irq_base;
 unsigned int gic_irq_flags[GIC_NUM_INTRS];

arch/mips/kernel/smp-mt.c

@@ -34,6 +34,7 @@
 #include <asm/mipsregs.h>
 #include <asm/mipsmtregs.h>
 #include <asm/mips_mt.h>
+#include <asm/gic.h>
 
 static void __init smvp_copy_vpe_config(void)
 {
@@ -151,8 +152,6 @@ 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 */
 	if (gic_present)
 		change_c0_status(ST0_IM, STATUSF_IP3 | STATUSF_IP4 |

arch/mips/mti-malta/malta-int.c

@@ -47,7 +47,6 @@
 #include <asm/setup.h>
 
 int gcmp_present = -1;
-int gic_present;
 static unsigned long _msc01_biu_base;
 static unsigned long _gcmp_base;
 static unsigned int ipi_map[NR_CPUS];

arch/mips/mti-sead3/sead3-int.c

@@ -20,7 +20,6 @@
 #define SEAD_CONFIG_BASE		0x1b100110
 #define SEAD_CONFIG_SIZE		4
 
-int gic_present;
 static unsigned long sead3_config_reg;
 
 /*