MIPS: Move 'gic_frequency' to common location.

Move the global variable 'gic_frequency' 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>
diff --git a/arch/mips/include/asm/gic.h b/arch/mips/include/asm/gic.h
index a05f97d..f1a1e98 100644
--- a/arch/mips/include/asm/gic.h
+++ b/arch/mips/include/asm/gic.h
@@ -360,6 +360,7 @@
 #define GIC_PIN_TO_VEC_OFFSET	(1)
 
 extern unsigned int gic_present;
+extern unsigned int gic_frequency;
 extern unsigned long _gic_base;
 extern unsigned int gic_irq_base;
 extern unsigned int gic_irq_flags[];
diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c
index 130aec6..eaf7c1e 100644
--- a/arch/mips/kernel/irq-gic.c
+++ b/arch/mips/kernel/irq-gic.c
@@ -19,6 +19,7 @@
 #include <linux/hardirq.h>
 #include <asm-generic/bitops/find.h>
 
+unsigned int gic_frequency;
 unsigned int gic_present;
 unsigned long _gic_base;
 unsigned int gic_irq_base;
diff --git a/arch/mips/mti-malta/malta-time.c b/arch/mips/mti-malta/malta-time.c
index 4dbdb2c..381ad06 100644
--- a/arch/mips/mti-malta/malta-time.c
+++ b/arch/mips/mti-malta/malta-time.c
@@ -42,7 +42,6 @@
 #include <asm/mips-boards/maltaint.h>
 
 unsigned long cpu_khz;
-int gic_frequency;
 
 static int mips_cpu_timer_irq;
 static int mips_cpu_perf_irq;