[MIPS] arch/mips/au1000/time.c cleanup

Mark au1xxx_timer_setup() __init, just because it is. Get rid of
unneeded extern's (note that (*do_gettimeoffset)() is already declared by
<asm/time.c>) and an unused variable. Kill some whitespace...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/au1000/common/time.c

@@ -50,10 +50,6 @@
 #include <linux/mc146818rtc.h>
 #include <linux/timex.h>
 
-extern void do_softirq(void);
-extern volatile unsigned long wall_jiffies;
-unsigned long missed_heart_beats = 0;
-
 static unsigned long r4k_offset; /* Amount to increment compare reg each time */
 static unsigned long r4k_cur;    /* What counter should be at next timer irq */
 int	no_au1xxx_32khz;
@@ -388,10 +384,9 @@ static unsigned long do_fast_pm_gettimeoffset(void)
 }
 #endif
 
-void au1xxx_timer_setup(struct irqaction *irq)
+void __init au1xxx_timer_setup(struct irqaction *irq)
 {
 	unsigned int est_freq;
-	extern unsigned long (*do_gettimeoffset)(void);
 
 	printk("calculating r4koff... ");
 	r4k_offset = cal_r4koff();