MIPS: Add new GIC clocksource.

Add new clocksource that uses the counter present on the MIPS
Global Interrupt Controller.

Signed-off-by: Steven J. Hill <sjhill@mips.com>
Patchwork: http://patchwork.linux-mips.org/patch/4681/
Signed-off-by: John Crispin <blogic@openwrt.org>
diff --git a/arch/mips/include/asm/gic.h b/arch/mips/include/asm/gic.h
index 37620db..bbddd25 100644
--- a/arch/mips/include/asm/gic.h
+++ b/arch/mips/include/asm/gic.h
@@ -359,6 +359,7 @@
 /* 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 long _gic_base;
 extern unsigned int gic_irq_base;
 extern unsigned int gic_irq_flags[];