[MIPS] Cobalt: Fix IRQ comment; the Cobalt kernel uses CP0 counter now.

Signed-off-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

include/asm-mips/mach-cobalt/irq.h

@@ -35,7 +35,7 @@
  *	4 - ethernet
  *	5 - 16550 UART
  *	6 - cascade i8259
- *	7 - CP0 counter (unused)
+ *	7 - CP0 counter
  */
 #define MIPS_CPU_IRQ_BASE		16
 
@@ -48,7 +48,6 @@
 #define SCSI_IRQ			(MIPS_CPU_IRQ_BASE + 5)
 #define I8259_CASCADE_IRQ		(MIPS_CPU_IRQ_BASE + 6)
 
-
 #define GT641XX_IRQ_BASE		24
 
 #include <asm/irq_gt641xx.h>