[ARM] hw_breakpoint.c: fix unused variable warning

Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index ff2c0ad..8fa8b20 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -891,7 +891,7 @@
 
 static void reset_ctrl_regs(void *unused)
 {
-	int i, raw_num_brps, err = 0, cpu = smp_processor_id();
+	int i, err = 0, cpu = smp_processor_id();
 	u32 dbg_power;
 
 	/*