MIPS: BCM63xx: Remove duplicate PERF_IRQSTAT_REG definition

Signed-off-by: NJonas Gorski <jonas.gorski@gmail.com>
Cc: linux-mips@linux-mips.org
Acked-by: NFlorian Fainelli <florian@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/2461/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h

@@ -89,7 +89,6 @@
 
 /* Interrupt Mask register */
 #define PERF_IRQMASK_REG		0xc
-#define PERF_IRQSTAT_REG		0x10
 
 /* Interrupt Status register */
 #define PERF_IRQSTAT_REG		0x10